feat(cryptotail): 尾盘监控双连接与分时图优化

- 监控 WebSocket 拆分为当前周期连接与下一周期连接，周期切换时关闭过期连接并新建下一周期
- 下一周期市场未创建时也建立第二条空连接，保证始终两条连接
- refreshSubscription 增加 Mutex 防重入，避免周期结束时定时器与消息同时触发导致重复执行
- 修复 initMonitor/buildPushData 中 getCurrentOpenClose、spreadMode/spreadValue 等 API 与实体字段引用
- 移除重复的 buildSubscriptionMap、buildPushData 等方法，修复 StrategyPriceData.periodStartUnix
- 前端分时图：市场价折线增加 connectNulls，新周期默认 0.5 价格展示
- 多语言与监控页入口、API 类型与 WebSocket 订阅集成

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/main/kotlin/com/wrbug/polymarketbot/config/MonitorServiceConfig.kt

@@ -0,0 +1,23 @@
+package com.wrbug.polymarketbot.config
+
+import com.wrbug.polymarketbot.service.common.WebSocketSubscriptionService
+import com.wrbug.polymarketbot.service.cryptotail.CryptoTailMonitorService
+import jakarta.annotation.PostConstruct
+import org.springframework.context.annotation.Configuration
+
+/**
+ * 尾盘监控服务配置
+ * 处理 WebSocketSubscriptionService 和 CryptoTailMonitorService 之间的循环依赖
+ */
+@Configuration
+class MonitorServiceConfig(
+    private val webSocketSubscriptionService: WebSocketSubscriptionService,
+    private val cryptoTailMonitorService: CryptoTailMonitorService
+) {
+    
+    @PostConstruct
+    fun init() {
+        // 在所有 Bean 初始化后设置引用
+        webSocketSubscriptionService.setCryptoTailMonitorService(cryptoTailMonitorService)
+    }
+}

backend/src/main/kotlin/com/wrbug/polymarketbot/controller/cryptotail/CryptoTailStrategyController.kt

@@ -11,9 +11,12 @@ import com.wrbug.polymarketbot.dto.CryptoTailStrategyTriggerListResponse
 import com.wrbug.polymarketbot.dto.CryptoTailStrategyUpdateRequest
 import com.wrbug.polymarketbot.dto.CryptoTailMarketOptionDto
 import com.wrbug.polymarketbot.dto.CryptoTailAutoMinSpreadResponse
+import com.wrbug.polymarketbot.dto.CryptoTailMonitorInitRequest
+import com.wrbug.polymarketbot.dto.CryptoTailMonitorInitResponse
 import com.wrbug.polymarketbot.enums.ErrorCode
 import com.wrbug.polymarketbot.service.binance.BinanceKlineAutoSpreadService
 import com.wrbug.polymarketbot.service.cryptotail.CryptoTailStrategyService
+import com.wrbug.polymarketbot.service.cryptotail.CryptoTailMonitorService
 import org.slf4j.LoggerFactory
 import org.springframework.context.MessageSource
 import org.springframework.http.ResponseEntity
@@ -26,6 +29,7 @@ import org.springframework.web.bind.annotation.RestController
 @RequestMapping("/api/crypto-tail-strategy")
 class CryptoTailStrategyController(
     private val cryptoTailStrategyService: CryptoTailStrategyService,
+    private val cryptoTailMonitorService: CryptoTailMonitorService,
     private val binanceKlineAutoSpreadService: BinanceKlineAutoSpreadService,
     private val messageSource: MessageSource
 ) {
@@ -173,7 +177,7 @@ class CryptoTailStrategyController(
                 return ResponseEntity.ok(ApiResponse.error(ErrorCode.PARAM_ERROR, messageSource = messageSource))
             }
             val periodStartUnix = (request["periodStartUnix"] as? Number)?.toLong()
-                ?: (System.currentTimeMillis() / 1000 / intervalSeconds) * intervalSeconds
+                ?: ((System.currentTimeMillis() / 1000 / intervalSeconds) * intervalSeconds)
             // 默认使用 BTC 市场（向后兼容）
             val marketSlugPrefix = (request["marketSlugPrefix"] as? String) ?: "btc-updown"
             val pair = binanceKlineAutoSpreadService.computeAndCache(marketSlugPrefix, intervalSeconds, periodStartUnix)
@@ -188,4 +192,28 @@ class CryptoTailStrategyController(
             ResponseEntity.ok(ApiResponse.error(ErrorCode.SERVER_ERROR, e.message, messageSource))
         }
     }
+
+    /**
+     * 初始化尾盘策略监控
+     * 返回策略信息、开盘价、tokenIds等初始化数据
+     */
+    @PostMapping("/monitor/init")
+    fun initMonitor(@RequestBody request: CryptoTailMonitorInitRequest): ResponseEntity<ApiResponse<CryptoTailMonitorInitResponse>> {
+        return try {
+            if (request.strategyId <= 0) {
+                return ResponseEntity.ok(ApiResponse.error(ErrorCode.CRYPTO_TAIL_STRATEGY_NOT_FOUND, messageSource = messageSource))
+            }
+            val result = cryptoTailMonitorService.initMonitor(request)
+            result.fold(
+                onSuccess = { ResponseEntity.ok(ApiResponse.success(it)) },
+                onFailure = { e ->
+                    logger.error("初始化尾盘监控失败: ${e.message}", e)
+                    ResponseEntity.ok(ApiResponse.error(ErrorCode.SERVER_ERROR, e.message, messageSource))
+                }
+            )
+        } catch (e: Exception) {
+            logger.error("初始化尾盘监控异常: ${e.message}", e)
+            ResponseEntity.ok(ApiResponse.error(ErrorCode.SERVER_ERROR, e.message, messageSource))
+        }
+    }
 }

backend/src/main/kotlin/com/wrbug/polymarketbot/dto/CryptoTailMonitorDto.kt

@@ -0,0 +1,103 @@
+package com.wrbug.polymarketbot.dto
+
+/**
+ * 尾盘策略监控初始化请求
+ */
+data class CryptoTailMonitorInitRequest(
+    /** 策略ID */
+    val strategyId: Long = 0L
+)
+
+/**
+ * 尾盘策略监控初始化响应
+ */
+data class CryptoTailMonitorInitResponse(
+    /** 策略ID */
+    val strategyId: Long = 0L,
+    /** 策略名称 */
+    val name: String = "",
+    /** 账户ID */
+    val accountId: Long = 0L,
+    /** 账户名称 */
+    val accountName: String = "",
+    /** 市场 slug 前缀 */
+    val marketSlugPrefix: String = "",
+    /** 市场标题 */
+    val marketTitle: String = "",
+    /** 周期秒数 (300=5m, 900=15m) */
+    val intervalSeconds: Int = 300,
+    /** 当前周期开始时间 (Unix 秒) */
+    val periodStartUnix: Long = 0L,
+    /** 时间窗口开始秒数 */
+    val windowStartSeconds: Int = 0,
+    /** 时间窗口结束秒数 */
+    val windowEndSeconds: Int = 0,
+    /** 最低价格 */
+    val minPrice: String = "0",
+    /** 最高价格 */
+    val maxPrice: String = "1",
+    /** 最小价差模式: NONE, FIXED, AUTO */
+    val minSpreadMode: String = "NONE",
+    /** 价差方向: MIN（显示周期内最小价差）, MAX（显示周期内最大价差） */
+    val spreadDirection: String = "MIN",
+    /** 最小价差数值 (FIXED 时有值) */
+    val minSpreadValue: String? = null,
+    /** 自动计算的最小价差 (Up方向) */
+    val autoMinSpreadUp: String? = null,
+    /** 自动计算的最小价差 (Down方向) */
+    val autoMinSpreadDown: String? = null,
+    /** BTC 开盘价 USDC（来自币安 K 线 open） */
+    val openPriceBtc: String? = null,
+    /** Up tokenId */
+    val tokenIdUp: String? = null,
+    /** Down tokenId */
+    val tokenIdDown: String? = null,
+    /** 当前时间 (毫秒时间戳) */
+    val currentTimestamp: Long = System.currentTimeMillis(),
+    /** 是否启用 */
+    val enabled: Boolean = true
+)
+
+/**
+ * 尾盘策略监控实时推送数据
+ */
+data class CryptoTailMonitorPushData(
+    /** 策略ID */
+    val strategyId: Long = 0L,
+    /** 推送时间 (毫秒时间戳) */
+    val timestamp: Long = System.currentTimeMillis(),
+    /** 当前周期开始时间 (Unix 秒) */
+    val periodStartUnix: Long = 0L,
+    /** 当前价格 (Up方向，来自订单簿) */
+    val currentPriceUp: String? = null,
+    /** 当前价格 (Down方向，来自订单簿) */
+    val currentPriceDown: String? = null,
+    /** 当前价差 (Up方向: 1 - currentPriceUp) */
+    val spreadUp: String? = null,
+    /** 当前价差 (Down方向: currentPriceUp) */
+    val spreadDown: String? = null,
+    /** 最小价差线 (Up方向) */
+    val minSpreadLineUp: String? = null,
+    /** 最小价差线 (Down方向，USDC 价差) */
+    val minSpreadLineDown: String? = null,
+    /** BTC 开盘价 USDC（币安 K 线 open） */
+    val openPriceBtc: String? = null,
+    /** BTC 最新价 USDC（币安 K 线 close，当前周期实时） */
+    val currentPriceBtc: String? = null,
+    /** BTC 价差 USDC（currentPriceBtc - openPriceBtc） */
+    val spreadBtc: String? = null,
+    /** 周期剩余秒数 */
+    val remainingSeconds: Int = 0,
+    /** 是否在时间窗口内 */
+    val inTimeWindow: Boolean = false,
+    /** 是否在价格区间内 (Up方向) */
+    val inPriceRangeUp: Boolean = false,
+    /** 是否在价格区间内 (Down方向) */
+    val inPriceRangeDown: Boolean = false,
+    /** 是否已触发 */
+    val triggered: Boolean = false,
+    /** 触发方向: UP, DOWN, null */
+    val triggerDirection: String? = null,
+    /** 周期是否已结束 */
+    val periodEnded: Boolean = false
+)

backend/src/main/kotlin/com/wrbug/polymarketbot/service/accounts/AccountService.kt

@@ -125,8 +125,8 @@ class AccountService(
 
             // 7. 加密敏感信息
             val encryptedPrivateKey = cryptoUtils.encrypt(request.privateKey)
-            val encryptedApiSecret = apiKeyCreds.secret?.let { cryptoUtils.encrypt(it) }
+            val encryptedApiSecret = apiKeyCreds.secret.let { cryptoUtils.encrypt(it) }
-            val encryptedApiPassphrase = apiKeyCreds.passphrase?.let { cryptoUtils.encrypt(it) }
+            val encryptedApiPassphrase = apiKeyCreds.passphrase.let { cryptoUtils.encrypt(it) }
 
             // 8. 生成账户名称（如果未提供，使用 SAFE/MAGIC-代理地址后4位）
             val accountName = if (request.accountName.isNullOrBlank()) {
@@ -518,8 +518,8 @@ class AccountService(
                     }
                     val creds = result.getOrNull()
                         ?: return Result.failure(IllegalStateException("API Key 返回为空"))
-                    val encryptedSecret = creds.secret?.let { cryptoUtils.encrypt(it) }
+                    val encryptedSecret = creds.secret.let { cryptoUtils.encrypt(it) }
-                    val encryptedPassphrase = creds.passphrase?.let { cryptoUtils.encrypt(it) }
+                    val encryptedPassphrase = creds.passphrase.let { cryptoUtils.encrypt(it) }
                     val updated = account.copy(
                         apiKey = creds.apiKey,
                         apiSecret = encryptedSecret,
@@ -1128,7 +1128,7 @@ class AccountService(
 
             // 3. 验证仓位是否存在并获取原始数量
             val positionsResult = getAllPositions()
-            val (position, originalQuantity) = positionsResult.fold(
+            val (_, originalQuantity) = positionsResult.fold(
                 onSuccess = { positionListResponse ->
                     val position = positionListResponse.currentPositions.find {
                         it.accountId == request.accountId &&
@@ -1161,7 +1161,7 @@ class AccountService(
                 onFailure = { e ->
                     return Result.failure(Exception("查询仓位失败: ${e.message}"))
                 }
-            ) ?: return Result.failure(IllegalArgumentException("仓位不存在"))
+            )
 
             // 4. 计算实际卖出数量
             val sellQuantity = if (percentDecimal != null) {
@@ -1280,7 +1280,7 @@ class AccountService(
 
             val newOrderRequest = com.wrbug.polymarketbot.api.NewOrderRequest(
                 order = signedOrder,
-                owner = account.apiKey!!,  // API Key
+                owner = account.apiKey,  // API Key
                 orderType = orderType,
                 deferExec = false
             )
@@ -1300,7 +1300,7 @@ class AccountService(
             }
 
             val clobApi = retrofitFactory.createClobApi(
-                account.apiKey!!,
+                account.apiKey,
                 apiSecret,
                 apiPassphrase,
                 account.walletAddress

backend/src/main/kotlin/com/wrbug/polymarketbot/service/binance/BinanceKlineService.kt

@@ -29,7 +29,9 @@ class BinanceKlineService {
     private val scope = CoroutineScope(Dispatchers.Default + SupervisorJob())
 
     private val wsBase = "wss://stream.binance.com:9443"
-    private val client = createClient().build()
+    private val client by lazy {
+        createClient().build()
+    }
 
     /** (marketSlugPrefix, intervalSeconds, periodStartUnix) -> (open, close) */
     private val openCloseByPeriod = ConcurrentHashMap<String, Pair<BigDecimal, BigDecimal>>()
@@ -82,6 +84,7 @@ class BinanceKlineService {
      */
     fun updateSubscriptions(marketPrefixes: Set<String>) {
         val normalized = marketPrefixes.map { it.lowercase() }.toSet()
+
         val parsed = normalized.mapNotNull { full ->
             parseMarketSlug(full)?.let { (base, interval) ->
                 getSymbol(base)?.let { symbol -> Triple(full, symbol, interval) }
@@ -123,14 +126,14 @@ class BinanceKlineService {
             else -> 300
         }
         val request = Request.Builder().url(url).build()
-        val ws = client.newWebSocket(request, object : WebSocketListener() {
+        client.newWebSocket(request, object : WebSocketListener() {
             override fun onOpen(webSocket: WebSocket, response: okhttp3.Response) {
                 connectedWebSockets[wsKey] = webSocket
                 logger.info("币安 K 线 WS 已连接: $streamName")
             }
 
             override fun onMessage(webSocket: WebSocket, text: String) {
-                parseKlineMessage(text, intervalSeconds)?.let { (tMs, o, c) ->
+                parseKlineMessage(text)?.let { (tMs, o, c) ->
                     onKline(marketPrefix, intervalSeconds, tMs, o, c)
                 }
             }
@@ -152,7 +155,7 @@ class BinanceKlineService {
         })
     }
 
-    private fun parseKlineMessage(text: String, intervalSeconds: Int): Triple<Long, BigDecimal, BigDecimal>? {
+    private fun parseKlineMessage(text: String): Triple<Long, BigDecimal, BigDecimal>? {
         return try {
             val json = com.google.gson.JsonParser.parseString(text).asJsonObject
             if (json.get("e")?.asString != "kline") return null
@@ -176,6 +179,8 @@ class BinanceKlineService {
             connectedWebSockets.values.forEach { it.close(1000, "reconnect") }
             connectedWebSockets.clear()
             logger.info("币安 K 线 WS 尝试重连")
+            // 清空 requiredMarketPrefixes，否则 updateSubscriptions(current) 内会因 normalized == requiredMarketPrefixes.get() 直接 return，不会重新 connectStream
+            requiredMarketPrefixes.set(emptySet())
             updateSubscriptions(current)
         }
     }

backend/src/main/kotlin/com/wrbug/polymarketbot/service/common/WebSocketSubscriptionService.kt

@@ -1,11 +1,13 @@
 package com.wrbug.polymarketbot.service.common
 
+import com.wrbug.polymarketbot.dto.CryptoTailMonitorPushData
 import com.wrbug.polymarketbot.dto.OrderPushMessage
 import com.wrbug.polymarketbot.dto.PositionPushMessage
 import com.wrbug.polymarketbot.dto.WebSocketMessage as WsMessage
 import com.wrbug.polymarketbot.dto.WebSocketMessageType
 import com.wrbug.polymarketbot.service.accounts.PositionPushService
 import com.wrbug.polymarketbot.service.copytrading.orders.OrderPushService
+import com.wrbug.polymarketbot.service.cryptotail.CryptoTailMonitorService
 import kotlinx.coroutines.*
 import org.slf4j.LoggerFactory
 import org.springframework.stereotype.Service
@@ -38,12 +40,26 @@ class WebSocketSubscriptionService(
     // 存储 order 频道的订阅回调：sessionId -> callback（用于取消订阅）
     private val orderChannelCallbacks = ConcurrentHashMap<String, (OrderPushMessage) -> Unit>()
     
+    // 存储尾盘监控频道的订阅回调：sessionId -> (strategyId -> callback)
+    private val monitorChannelCallbacks = ConcurrentHashMap<String, MutableMap<Long, (CryptoTailMonitorPushData) -> Unit>>()
+    
+    // 尾盘监控服务（延迟注入，避免循环依赖）
+    private var cryptoTailMonitorService: CryptoTailMonitorService? = null
+    
+    /**
+     * 设置尾盘监控服务（由 Spring 在初始化后调用）
+     */
+    fun setCryptoTailMonitorService(service: CryptoTailMonitorService) {
+        cryptoTailMonitorService = service
+    }
+    
     /**
      * 注册会话
      */
     fun registerSession(sessionId: String, callback: (WsMessage) -> Unit) {
         sessionCallbacks[sessionId] = callback
         sessionSubscriptions[sessionId] = mutableSetOf()
+        monitorChannelCallbacks[sessionId] = mutableMapOf()
     }
     
     /**
@@ -60,6 +76,12 @@ class WebSocketSubscriptionService(
         // 清理 order 频道的回调
         orderChannelCallbacks.remove(sessionId)
         
+        // 清理尾盘监控频道的回调
+        val monitorCallbacks = monitorChannelCallbacks.remove(sessionId)
+        monitorCallbacks?.keys?.forEach { strategyId ->
+            cryptoTailMonitorService?.unsubscribe(sessionId, strategyId)
+        }
+        
         sessionCallbacks.remove(sessionId)
     }
     
@@ -83,8 +105,8 @@ class WebSocketSubscriptionService(
         sendSubscribeAck(sessionId, channel, true)
         
         // 根据频道类型启动推送服务
-        when (channel) {
+        when {
-            "position" -> {
+            channel == "position" -> {
                 positionPushService.subscribe(sessionId) { message ->
                     pushData(sessionId, channel, message)
                 }
@@ -97,7 +119,7 @@ class WebSocketSubscriptionService(
                     }
                 }
             }
-            "order" -> {
+            channel == "order" -> {
                 // 订单推送：自动订阅所有启用的账户
                 val callback: (OrderPushMessage) -> Unit = { message ->
                     pushData(sessionId, channel, message)
@@ -105,6 +127,20 @@ class WebSocketSubscriptionService(
                 orderChannelCallbacks[sessionId] = callback
                 orderPushService.subscribeAllEnabled(callback)
             }
+            channel.startsWith("crypto_tail_monitor_") -> {
+                // 尾盘策略监控频道
+                val strategyId = channel.removePrefix("crypto_tail_monitor_").toLongOrNull()
+                if (strategyId != null && cryptoTailMonitorService != null) {
+                    val callback: (CryptoTailMonitorPushData) -> Unit = { message ->
+                        pushData(sessionId, channel, message)
+                    }
+                    monitorChannelCallbacks.getOrPut(sessionId) { mutableMapOf() }[strategyId] = callback
+                    cryptoTailMonitorService!!.subscribe(sessionId, strategyId, callback)
+                } else {
+                    logger.warn("无效的尾盘监控频道或服务未初始化: $channel")
+                    sendSubscribeAck(sessionId, channel, false, "无效的策略ID")
+                }
+            }
             else -> {
                 logger.warn("未知的频道: $channel")
                 sendSubscribeAck(sessionId, channel, false, "未知的频道")
@@ -122,15 +158,58 @@ class WebSocketSubscriptionService(
         channelSubscriptions[channel]?.remove(sessionId)
         
         // 取消推送服务的订阅（推送服务内部会处理是否停止轮询）
-        when (channel) {
+        when {
-            "position" -> positionPushService.unsubscribe(sessionId)
+            channel == "position" -> positionPushService.unsubscribe(sessionId)
-            "order" -> {
+            channel == "order" -> {
                 // 取消订阅所有账户的订单推送
                 val callback = orderChannelCallbacks.remove(sessionId)
                 if (callback != null) {
                     orderPushService.unsubscribeAll(callback)
                 }
             }
+            channel.startsWith("crypto_tail_monitor_") -> {
+                // 取消尾盘监控订阅
+                val strategyId = channel.removePrefix("crypto_tail_monitor_").toLongOrNull()
+                if (strategyId != null) {
+                    monitorChannelCallbacks[sessionId]?.remove(strategyId)
+                    cryptoTailMonitorService?.unsubscribe(sessionId, strategyId)
+                }
+            }
+        }
+    }
+    
+    /**
+     * 注册尾盘监控回调（由 CryptoTailMonitorService 调用）
+     */
+    fun registerMonitorCallback(sessionId: String, strategyId: Long, callback: (CryptoTailMonitorPushData) -> Unit) {
+        monitorChannelCallbacks.getOrPut(sessionId) { mutableMapOf() }[strategyId] = callback
+    }
+    
+    /**
+     * 注销尾盘监控回调（由 CryptoTailMonitorService 调用）
+     */
+    fun unregisterMonitorCallback(sessionId: String, strategyId: Long) {
+        monitorChannelCallbacks[sessionId]?.remove(strategyId)
+    }
+    
+    /**
+     * 推送尾盘监控数据（由 CryptoTailMonitorService 调用）
+     */
+    fun pushMonitorData(strategyId: Long, data: CryptoTailMonitorPushData) {
+        val channel = "crypto_tail_monitor_$strategyId"
+        val sessionIds = channelSubscriptions[channel] ?: return
+        
+        for (sessionId in sessionIds) {
+            val callback = sessionCallbacks[sessionId]
+            if (callback != null) {
+                val message = WsMessage(
+                    type = WebSocketMessageType.DATA.value,
+                    channel = channel,
+                    payload = data,
+                    timestamp = System.currentTimeMillis()
+                )
+                callback(message)
+            }
         }
     }
     
@@ -168,4 +247,3 @@ class WebSocketSubscriptionService(
         }
     }
 }
-

backend/src/main/kotlin/com/wrbug/polymarketbot/service/cryptotail/CryptoTailMonitorService.kt

@@ -0,0 +1,781 @@
+package com.wrbug.polymarketbot.service.cryptotail
+
+import com.wrbug.polymarketbot.api.GammaEventBySlugResponse
+import com.wrbug.polymarketbot.constants.PolymarketConstants
+import com.wrbug.polymarketbot.dto.CryptoTailMonitorInitRequest
+import com.wrbug.polymarketbot.dto.CryptoTailMonitorInitResponse
+import com.wrbug.polymarketbot.dto.CryptoTailMonitorPushData
+import com.wrbug.polymarketbot.entity.CryptoTailStrategy
+import com.wrbug.polymarketbot.repository.AccountRepository
+import com.wrbug.polymarketbot.repository.CryptoTailStrategyRepository
+import com.wrbug.polymarketbot.service.binance.BinanceKlineAutoSpreadService
+import com.wrbug.polymarketbot.service.binance.BinanceKlineService
+import com.wrbug.polymarketbot.service.common.WebSocketSubscriptionService
+import com.wrbug.polymarketbot.util.RetrofitFactory
+import com.wrbug.polymarketbot.util.fromJson
+import com.wrbug.polymarketbot.util.toJson
+import com.wrbug.polymarketbot.util.toSafeBigDecimal
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.sync.Mutex
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.WebSocket
+import okhttp3.WebSocketListener
+import org.slf4j.LoggerFactory
+import org.springframework.context.event.EventListener
+import org.springframework.stereotype.Service
+import jakarta.annotation.PostConstruct
+import jakarta.annotation.PreDestroy
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.runBlocking
+import java.math.BigDecimal
+import java.math.RoundingMode
+import java.util.Collections
+import java.util.concurrent.ConcurrentHashMap
+import java.util.concurrent.atomic.AtomicBoolean
+import java.util.concurrent.atomic.AtomicReference
+
+/**
+ * 尾盘策略监控服务
+ * 负责实时推送监控数据到前端
+ */
+@Service
+class CryptoTailMonitorService(
+    private val strategyRepository: CryptoTailStrategyRepository,
+    private val accountRepository: AccountRepository,
+    private val retrofitFactory: RetrofitFactory,
+    private val binanceKlineService: BinanceKlineService,
+    private val binanceKlineAutoSpreadService: BinanceKlineAutoSpreadService,
+    private val webSocketSubscriptionService: WebSocketSubscriptionService
+) {
+
+    private val logger = LoggerFactory.getLogger(CryptoTailMonitorService::class.java)
+    private val scope = CoroutineScope(Dispatchers.Default + SupervisorJob())
+
+    /** 当前周期 token 映射 */
+    private val currentPeriodTokenToStrategy = AtomicReference<Map<String, List<MonitorEntry>>>(emptyMap())
+    /** 下一周期 token 映射 */
+    private val nextPeriodTokenToStrategy = AtomicReference<Map<String, List<MonitorEntry>>>(emptyMap())
+
+    /** strategyId -> 当前价格数据 */
+    private val strategyPriceData = ConcurrentHashMap<Long, StrategyPriceData>()
+
+    /** strategyId -> 订阅者数量 */
+    private val strategySubscribers = ConcurrentHashMap<Long, Int>()
+
+    private var currentPeriodWebSocket: WebSocket? = null
+    private var nextPeriodWebSocket: WebSocket? = null
+    private val wsUrl = PolymarketConstants.RTDS_WS_URL + "/ws/market"
+    private val client = OkHttpClient.Builder().build()
+
+    private val reconnectDelayMs = 3_000L
+    private var reconnectJob: Job? = null
+    private val closedForNoSubscribers = AtomicBoolean(false)
+    private val connectLock = Any()
+
+    /** 防止 refreshSubscription 并发执行（周期结束时定时器与消息可能同时触发） */
+    private val refreshSubscriptionMutex = Mutex()
+
+    /** 周期结束倒计时 Job */
+    private var periodEndCountdownJob: Job? = null
+
+    /** 定时推送 Job（每 1.5 秒推送一次，保证 BTC 价格和分时图持续更新） */
+    private var periodicPushJob: Job? = null
+    private val pushIntervalMs = 1_500L
+
+    /** 策略推送历史（用于中途进入时补全分时图，最多保留 300 条） */
+    private val strategyPushHistory = ConcurrentHashMap<Long, MutableList<CryptoTailMonitorPushData>>()
+    private val strategyHistoryPeriod = ConcurrentHashMap<Long, Long>()
+    private val maxHistorySize = 300
+
+    data class MonitorEntry(
+        val strategyId: Long,
+        val strategy: CryptoTailStrategy,
+        val periodStartUnix: Long,
+        val outcomeIndex: Int,
+        val tokenId: String,
+        /** 是否为下一个周期（用于预先订阅） */
+        val isNextPeriod: Boolean = false
+    )
+
+    data class StrategyPriceData(
+        val currentPriceUp: BigDecimal? = null,
+        val currentPriceDown: BigDecimal? = null,
+        /** BTC 开盘价 USDC（币安 K 线 open） */
+        val openPriceBtc: BigDecimal? = null,
+        val spreadUp: BigDecimal? = null,
+        val spreadDown: BigDecimal? = null,
+        val minSpreadLineUp: BigDecimal? = null,
+        val minSpreadLineDown: BigDecimal? = null,
+        val triggered: Boolean = false,
+        val triggerDirection: String? = null,
+        val lastUpdateTime: Long = System.currentTimeMillis(),
+        /** 当前周期开始时间（用于双连接周期切换） */
+        val periodStartUnix: Long? = null
+    )
+
+    @PostConstruct
+    fun init() {
+        // 服务启动时不主动连接，等待前端订阅
+    }
+
+    /**
+     * 初始化监控数据
+     */
+    fun initMonitor(request: CryptoTailMonitorInitRequest): Result<CryptoTailMonitorInitResponse> {
+        return try {
+            val strategy = strategyRepository.findById(request.strategyId).orElse(null)
+            if (strategy == null) {
+                return Result.failure(IllegalArgumentException("策略不存在"))
+            }
+
+            val account = accountRepository.findById(strategy.accountId).orElse(null)
+            val nowSeconds = System.currentTimeMillis() / 1000
+            val periodStartUnix = (nowSeconds / strategy.intervalSeconds) * strategy.intervalSeconds
+
+            // 获取市场信息
+            val slug = "${strategy.marketSlugPrefix}-$periodStartUnix"
+            val event = fetchEventBySlug(slug).getOrNull()
+            val market = event?.markets?.firstOrNull()
+            val tokenIds = parseClobTokenIds(market?.clobTokenIds)
+
+            // 获取开盘价（币安 K 线 open = BTC 价格 USDC）
+            val openClose = binanceKlineService.getCurrentOpenClose(strategy.marketSlugPrefix, strategy.intervalSeconds, periodStartUnix)
+            val openPriceBtc = openClose?.first
+
+            // 获取自动计算的最小价差
+            var autoMinSpreadUp: BigDecimal? = null
+            var autoMinSpreadDown: BigDecimal? = null
+            if (strategy.spreadMode.name.uppercase() == "AUTO") {
+                val autoSpreads = binanceKlineAutoSpreadService.computeAndCache(strategy.marketSlugPrefix, strategy.intervalSeconds, periodStartUnix)
+                autoMinSpreadUp = autoSpreads?.first
+                autoMinSpreadDown = autoSpreads?.second
+            }
+
+            // 保存价格数据到缓存
+            val priceData = StrategyPriceData(
+                openPriceBtc = openPriceBtc,
+                minSpreadLineUp = autoMinSpreadUp ?: strategy.spreadValue?.toSafeBigDecimal(),
+                minSpreadLineDown = autoMinSpreadDown ?: strategy.spreadValue?.toSafeBigDecimal(),
+                periodStartUnix = periodStartUnix
+            )
+            strategyPriceData[strategy.id!!] = priceData
+
+            val response = CryptoTailMonitorInitResponse(
+                strategyId = strategy.id!!,
+                name = strategy.name ?: "",
+                accountId = strategy.accountId,
+                accountName = account?.accountName ?: "",
+                marketSlugPrefix = strategy.marketSlugPrefix,
+                marketTitle = event?.title ?: strategy.marketSlugPrefix,
+                intervalSeconds = strategy.intervalSeconds,
+                periodStartUnix = periodStartUnix,
+                windowStartSeconds = strategy.windowStartSeconds,
+                windowEndSeconds = strategy.windowEndSeconds,
+                minPrice = strategy.minPrice.toPlainString(),
+                maxPrice = strategy.maxPrice.toPlainString(),
+                minSpreadMode = strategy.spreadMode.name,
+                minSpreadValue = strategy.spreadValue?.toPlainString(),
+                autoMinSpreadUp = autoMinSpreadUp?.toPlainString(),
+                autoMinSpreadDown = autoMinSpreadDown?.toPlainString(),
+                openPriceBtc = openPriceBtc?.setScale(2, RoundingMode.HALF_UP)?.toPlainString(),
+                tokenIdUp = tokenIds.getOrNull(0),
+                tokenIdDown = tokenIds.getOrNull(1),
+                currentTimestamp = System.currentTimeMillis(),
+                enabled = strategy.enabled
+            )
+
+            Result.success(response)
+        } catch (e: Exception) {
+            logger.error("初始化监控失败: ${e.message}", e)
+            Result.failure(e)
+        }
+    }
+
+    /**
+     * 订阅策略监控
+     */
+    fun subscribe(sessionId: String, strategyId: Long, callback: (CryptoTailMonitorPushData) -> Unit) {
+        // 增加订阅计数
+        val count = strategySubscribers.merge(strategyId, 1) { old, inc -> old + inc } ?: 1
+        logger.info("策略 $strategyId 订阅数: $count")
+
+        // 注册推送回调
+        webSocketSubscriptionService.registerMonitorCallback(sessionId, strategyId, callback)
+
+        // 如果是第一个订阅者，启动 WebSocket 和定时推送
+        if (count == 1) {
+            scope.launch {
+                refreshSubscription()
+            }
+            startPeriodicPush()
+        }
+
+        // 立即发送当前数据
+        scope.launch {
+            try {
+                sendCurrentData(sessionId, strategyId, callback)
+            } catch (e: Exception) {
+                logger.error("发送当前监控数据失败: $sessionId, ${e.message}")
+            }
+        }
+    }
+
+    /**
+     * 取消订阅策略监控
+     */
+    fun unsubscribe(sessionId: String, strategyId: Long) {
+        // 减少订阅计数
+        val count = strategySubscribers.merge(strategyId, -1) { old, dec -> (old - dec).coerceAtLeast(0) } ?: 0
+        logger.info("策略 $strategyId 订阅数: $count")
+
+        // 移除回调
+        webSocketSubscriptionService.unregisterMonitorCallback(sessionId, strategyId)
+
+        // 如果没有订阅者，关闭 WebSocket 和定时推送
+        if (count == 0) {
+            strategySubscribers.remove(strategyId)
+            scope.launch {
+                refreshSubscription()
+            }
+            stopPeriodicPush()
+        }
+    }
+
+    private fun startPeriodicPush() {
+        if (periodicPushJob?.isActive == true) return
+        periodicPushJob = scope.launch {
+            while (strategySubscribers.isNotEmpty() && strategySubscribers.values.any { (it ?: 0) > 0 }) {
+                delay(pushIntervalMs)
+                if (closedForNoSubscribers.get()) continue
+                val ids = strategySubscribers.filter { (it.value ?: 0) > 0 }.keys.toList()
+                for (strategyId in ids) {
+                    try {
+                        val strategy = strategyRepository.findById(strategyId).orElse(null) ?: continue
+                        val priceData = strategyPriceData[strategyId] ?: continue
+                        val pushData = buildPushData(strategy, priceData)
+                        addToHistoryAndPush(strategyId, pushData)
+                    } catch (e: Exception) {
+                        logger.debug("定时推送失败 strategyId=$strategyId: ${e.message}")
+                    }
+                }
+            }
+        }
+    }
+
+    private fun stopPeriodicPush() {
+        if (strategySubscribers.isEmpty() || strategySubscribers.values.all { (it ?: 0) <= 0 }) {
+            periodicPushJob?.cancel()
+            periodicPushJob = null
+        }
+    }
+
+    /**
+     * 发送当前数据（含历史补全，用于中途进入时填充分时图）
+     */
+    private suspend fun sendCurrentData(sessionId: String, strategyId: Long, callback: (CryptoTailMonitorPushData) -> Unit) {
+        val strategy = strategyRepository.findById(strategyId).orElse(null) ?: return
+        val priceData = strategyPriceData[strategyId] ?: StrategyPriceData()
+
+        val history = strategyPushHistory[strategyId]?.let { list ->
+            synchronized(list) { list.toList() }
+        } ?: emptyList()
+        for (item in history) {
+            callback(item)
+        }
+
+        val pushData = buildPushData(strategy, priceData)
+        callback(pushData)
+    }
+
+    /**
+     * 刷新订阅：双连接模式。当前周期连接 + 下一周期连接；周期切换时关闭过期连接，下一连接晋升为当前，并新建下一周期连接。
+     * 使用 Mutex 防止周期结束时 scheduleRefreshAtPeriodEnd 与 maybeRefreshSubscriptionIfPeriodChanged 同时触发导致重复执行。
+     */
+    private suspend fun refreshSubscription() {
+        if (!refreshSubscriptionMutex.tryLock()) {
+            logger.debug("refreshSubscription 正在执行，跳过本次并发调用")
+            return
+        }
+        try {
+            refreshSubscriptionInternal()
+        } finally {
+            refreshSubscriptionMutex.unlock()
+        }
+    }
+
+    private suspend fun refreshSubscriptionInternal() {
+        periodEndCountdownJob?.cancel()
+        periodEndCountdownJob = null
+
+        val subscribedStrategyIds = strategySubscribers.keys.filter { (strategySubscribers[it] ?: 0) > 0 }
+        if (subscribedStrategyIds.isEmpty()) {
+            closeAllWebSockets()
+            return
+        }
+
+        val strategies = strategyRepository.findAllById(subscribedStrategyIds).filter { it.enabled && it.id != null }
+        if (strategies.isEmpty()) {
+            closeAllWebSockets()
+            return
+        }
+
+        val nowSeconds = System.currentTimeMillis() / 1000
+        val isSwitch = currentPeriodWebSocket != null
+
+        if (isSwitch) {
+            // 周期切换：关闭当前周期连接，下一晋升为当前，新建下一周期连接
+            closeCurrentPeriodWebSocket()
+            currentPeriodWebSocket = nextPeriodWebSocket
+            nextPeriodWebSocket = null
+            val nextMap = nextPeriodTokenToStrategy.get()
+            currentPeriodTokenToStrategy.set(nextMap)
+            val nextPeriodByStrategy = nextMap.values.flatten().distinctBy { it.strategyId }.associate { it.strategyId to it.periodStartUnix }
+            logger.info("周期切换：下一周期连接晋升为当前")
+            for ((strategyId, periodStartUnix) in nextPeriodByStrategy) {
+                updateStrategyPriceDataForPeriod(listOf(strategyId), periodStartUnix, pushDefault = true)
+            }
+            val (newNextTokenIds, newNextMap) = buildSubscriptionMapForNextPeriod(subscribedStrategyIds)
+            nextPeriodTokenToStrategy.set(newNextMap)
+            if (newNextTokenIds.isNotEmpty()) {
+                connectNextPeriod(newNextTokenIds, newNextMap)
+            } else {
+                logger.info("下一周期市场尚未创建，仅建立空连接以便周期切换时复用")
+                connectNextPeriod(emptyList(), emptyMap())
+            }
+            scheduleRefreshAtPeriodEnd(if (newNextMap.isNotEmpty()) newNextMap else nextMap)
+        } else {
+            // 首次：建立当前周期连接 + 下一周期连接
+            val (currentTokenIds, currentMap) = buildSubscriptionMapForCurrentPeriod(subscribedStrategyIds)
+            currentPeriodTokenToStrategy.set(currentMap)
+            for (entry in currentMap.values.flatten().distinctBy { it.strategyId }) {
+                updateStrategyPriceDataForPeriod(listOf(entry.strategyId), entry.periodStartUnix, pushDefault = false)
+            }
+            if (currentTokenIds.isEmpty()) {
+                closeAllWebSockets()
+                return
+            }
+            connectCurrentPeriod(currentTokenIds, currentMap)
+            val (nextTokenIds, nextMap) = buildSubscriptionMapForNextPeriod(subscribedStrategyIds)
+            nextPeriodTokenToStrategy.set(nextMap)
+            if (nextTokenIds.isNotEmpty()) {
+                connectNextPeriod(nextTokenIds, nextMap)
+            } else {
+                logger.info("下一周期市场尚未创建，先建立空连接，周期切换时会重新订阅")
+                connectNextPeriod(emptyList(), emptyMap())
+            }
+            scheduleRefreshAtPeriodEnd(currentMap)
+        }
+    }
+
+    /** 构建当前周期订阅（每个策略按自己的 interval 算当前周期） */
+    private suspend fun buildSubscriptionMapForCurrentPeriod(strategyIds: List<Long>): Pair<List<String>, Map<String, List<MonitorEntry>>> {
+        val strategies = strategyRepository.findAllById(strategyIds)
+        val nowSeconds = System.currentTimeMillis() / 1000
+        val tokenIdSet = mutableSetOf<String>()
+        val map = mutableMapOf<String, MutableList<MonitorEntry>>()
+
+        for (strategy in strategies) {
+            if (!strategy.enabled || strategy.id == null) continue
+            val strategyPeriod = (nowSeconds / strategy.intervalSeconds) * strategy.intervalSeconds
+            val slug = "${strategy.marketSlugPrefix}-$strategyPeriod"
+            val event = fetchEventBySlug(slug).getOrNull() ?: continue
+            val market = event.markets?.firstOrNull() ?: continue
+            val tokenIds = parseClobTokenIds(market.clobTokenIds)
+            if (tokenIds.size < 2) continue
+            for (i in tokenIds.indices) {
+                tokenIdSet.add(tokenIds[i])
+                map.getOrPut(tokenIds[i]) { mutableListOf() }.add(
+                    MonitorEntry(strategy.id!!, strategy, strategyPeriod, i, tokenIds[i], false)
+                )
+            }
+        }
+        return Pair(tokenIdSet.toList(), map)
+    }
+
+    /** 构建下一周期订阅（每个策略按自己的 interval 算下一周期） */
+    private suspend fun buildSubscriptionMapForNextPeriod(strategyIds: List<Long>): Pair<List<String>, Map<String, List<MonitorEntry>>> {
+        val strategies = strategyRepository.findAllById(strategyIds)
+        val nowSeconds = System.currentTimeMillis() / 1000
+        val tokenIdSet = mutableSetOf<String>()
+        val map = mutableMapOf<String, MutableList<MonitorEntry>>()
+
+        for (strategy in strategies) {
+            if (!strategy.enabled || strategy.id == null) continue
+            val currentPeriod = (nowSeconds / strategy.intervalSeconds) * strategy.intervalSeconds
+            val nextPeriod = currentPeriod + strategy.intervalSeconds
+            val slug = "${strategy.marketSlugPrefix}-$nextPeriod"
+            val event = fetchEventBySlug(slug).getOrNull() ?: continue
+            val market = event.markets?.firstOrNull() ?: continue
+            val tokenIds = parseClobTokenIds(market.clobTokenIds)
+            if (tokenIds.size < 2) continue
+            for (i in tokenIds.indices) {
+                tokenIdSet.add(tokenIds[i])
+                map.getOrPut(tokenIds[i]) { mutableListOf() }.add(
+                    MonitorEntry(strategy.id!!, strategy, nextPeriod, i, tokenIds[i], true)
+                )
+            }
+        }
+        return Pair(tokenIdSet.toList(), map)
+    }
+
+    /** 更新策略价格数据为指定周期（开盘价、价差线等），可选是否推送默认 0.5 */
+    private suspend fun updateStrategyPriceDataForPeriod(strategyIds: List<Long>, periodStartUnix: Long, pushDefault: Boolean) {
+        val strategies = strategyRepository.findAllById(strategyIds)
+        for (strategy in strategies) {
+            if (strategy.id == null) continue
+            val openClose = binanceKlineService.getCurrentOpenClose(strategy.marketSlugPrefix, strategy.intervalSeconds, periodStartUnix)
+            val openPriceBtc = openClose?.first
+            var minSpreadLineUp: BigDecimal? = null
+            var minSpreadLineDown: BigDecimal? = null
+            when (strategy.spreadMode.name.uppercase()) {
+                "FIXED" -> {
+                    minSpreadLineUp = strategy.spreadValue?.toSafeBigDecimal()
+                    minSpreadLineDown = strategy.spreadValue?.toSafeBigDecimal()
+                }
+                "AUTO" -> {
+                    val autoSpreads = binanceKlineAutoSpreadService.computeAndCache(strategy.marketSlugPrefix, strategy.intervalSeconds, periodStartUnix)
+                    minSpreadLineUp = autoSpreads?.first
+                    minSpreadLineDown = autoSpreads?.second
+                }
+            }
+            val existingData = strategyPriceData[strategy.id] ?: StrategyPriceData()
+            val periodChanged = existingData.periodStartUnix != null && existingData.periodStartUnix != periodStartUnix
+            val newData = StrategyPriceData(
+                currentPriceUp = if (periodChanged && pushDefault) BigDecimal("0.5") else existingData.currentPriceUp,
+                currentPriceDown = if (periodChanged && pushDefault) BigDecimal("0.5") else existingData.currentPriceDown,
+                spreadUp = if (periodChanged && pushDefault) BigDecimal("0.5") else existingData.spreadUp,
+                spreadDown = if (periodChanged && pushDefault) BigDecimal("0.5") else existingData.spreadDown,
+                openPriceBtc = openPriceBtc,
+                minSpreadLineUp = minSpreadLineUp,
+                minSpreadLineDown = minSpreadLineDown,
+                periodStartUnix = periodStartUnix
+            )
+            strategyPriceData[strategy.id!!] = newData
+            if (periodChanged && pushDefault) {
+                val pushData = buildPushData(strategy, newData)
+                addToHistoryAndPush(strategy.id!!, pushData)
+            }
+        }
+    }
+
+    private fun connectCurrentPeriod(tokenIds: List<String>, map: Map<String, List<MonitorEntry>>) {
+        if (currentPeriodWebSocket != null) return
+        val request = Request.Builder().url(wsUrl).build()
+        currentPeriodWebSocket = client.newWebSocket(request, object : WebSocketListener() {
+            override fun onOpen(webSocket: WebSocket, response: okhttp3.Response) {
+                closedForNoSubscribers.set(false)
+                val msg = """{"type":"MARKET","assets_ids":${tokenIds.toJson()}}"""
+                try {
+                    webSocket.send(msg)
+                    logger.info("尾盘监控 WebSocket（当前周期）已连接并订阅: ${tokenIds.size} 个 token")
+                } catch (e: Exception) {
+                    logger.warn("发送当前周期订阅失败: ${e.message}")
+                }
+            }
+
+            override fun onMessage(webSocket: WebSocket, text: String) {
+                handleMessage(webSocket, text, isFromCurrentPeriod = true)
+            }
+
+            override fun onClosing(webSocket: WebSocket, code: Int, reason: String) {
+                if (this@CryptoTailMonitorService.currentPeriodWebSocket == webSocket) {
+                    this@CryptoTailMonitorService.currentPeriodWebSocket = null
+                    if (!closedForNoSubscribers.get()) scheduleReconnect()
+                }
+            }
+
+            override fun onFailure(webSocket: WebSocket, t: Throwable, response: okhttp3.Response?) {
+                if (this@CryptoTailMonitorService.currentPeriodWebSocket == webSocket) {
+                    this@CryptoTailMonitorService.currentPeriodWebSocket = null
+                    scheduleReconnect()
+                }
+            }
+        })
+    }
+
+    private fun connectNextPeriod(tokenIds: List<String>, map: Map<String, List<MonitorEntry>>) {
+        if (nextPeriodWebSocket != null) return
+        val request = Request.Builder().url(wsUrl).build()
+        nextPeriodWebSocket = client.newWebSocket(request, object : WebSocketListener() {
+            override fun onOpen(webSocket: WebSocket, response: okhttp3.Response) {
+                val msg = """{"type":"MARKET","assets_ids":${tokenIds.toJson()}}"""
+                try {
+                    webSocket.send(msg)
+                    if (tokenIds.isEmpty()) {
+                        logger.info("尾盘监控 WebSocket（下一周期）已连接，暂无 token 订阅，等待周期切换后更新")
+                    } else {
+                        logger.info("尾盘监控 WebSocket（下一周期）已连接并订阅: ${tokenIds.size} 个 token")
+                    }
+                } catch (e: Exception) {
+                    logger.warn("发送下一周期订阅失败: ${e.message}")
+                }
+            }
+
+            override fun onMessage(webSocket: WebSocket, text: String) {
+                handleMessage(webSocket, text, isFromCurrentPeriod = false)
+            }
+
+            override fun onClosing(webSocket: WebSocket, code: Int, reason: String) {
+                if (this@CryptoTailMonitorService.nextPeriodWebSocket == webSocket) {
+                    this@CryptoTailMonitorService.nextPeriodWebSocket = null
+                }
+            }
+
+            override fun onFailure(webSocket: WebSocket, t: Throwable, response: okhttp3.Response?) {
+                if (this@CryptoTailMonitorService.nextPeriodWebSocket == webSocket) {
+                    this@CryptoTailMonitorService.nextPeriodWebSocket = null
+                }
+            }
+        })
+    }
+
+    private fun closeCurrentPeriodWebSocket() {
+        currentPeriodWebSocket?.close(1000, "period_ended")
+        currentPeriodWebSocket = null
+        logger.info("尾盘监控 WebSocket（当前周期）已关闭")
+    }
+
+    private fun closeAllWebSockets() {
+        reconnectJob?.cancel()
+        reconnectJob = null
+        closedForNoSubscribers.set(true)
+        currentPeriodWebSocket?.close(1000, "no_subscribers")
+        currentPeriodWebSocket = null
+        nextPeriodWebSocket?.close(1000, "no_subscribers")
+        nextPeriodWebSocket = null
+        logger.info("尾盘监控 WebSocket 已全部关闭（无订阅者）")
+    }
+
+    private fun handleMessage(webSocket: WebSocket, text: String, isFromCurrentPeriod: Boolean) {
+        if (text == "pong" || text.isEmpty()) return
+        if (closedForNoSubscribers.get()) return
+        if (!isFromCurrentPeriod) return
+
+        maybeRefreshSubscriptionIfPeriodChanged()
+
+        val json = text.fromJson<com.google.gson.JsonObject>() ?: return
+        val eventType = (json.get("event_type") as? com.google.gson.JsonPrimitive)?.asString ?: return
+        val map = currentPeriodTokenToStrategy.get()
+
+        when (eventType) {
+            "book" -> {
+                val assetId = (json.get("asset_id") as? com.google.gson.JsonPrimitive)?.asString ?: return
+                val bids = json.get("bids") as? com.google.gson.JsonArray
+                if (bids == null || bids.isEmpty) return
+                val firstBid = bids.get(0) as? com.google.gson.JsonObject
+                val bestBid = (firstBid?.get("price") as? com.google.gson.JsonPrimitive)?.asString?.toSafeBigDecimal()
+                if (bestBid != null) onPriceUpdate(assetId, bestBid, map)
+            }
+            "price_change" -> {
+                val priceChanges = json.get("price_changes") as? com.google.gson.JsonArray ?: return
+                for (i in 0 until priceChanges.size()) {
+                    val pc = priceChanges.get(i) as? com.google.gson.JsonObject ?: continue
+                    val assetId = (pc.get("asset_id") as? com.google.gson.JsonPrimitive)?.asString ?: continue
+                    val bestBidStr = (pc.get("best_bid") as? com.google.gson.JsonPrimitive)?.asString
+                    val bestBid = bestBidStr?.toSafeBigDecimal()
+                    if (bestBid != null) onPriceUpdate(assetId, bestBid, map)
+                }
+            }
+        }
+    }
+
+    private fun onPriceUpdate(tokenId: String, bestBid: BigDecimal, map: Map<String, List<MonitorEntry>>) {
+        if (closedForNoSubscribers.get()) return
+        val entries = map[tokenId] ?: return
+
+        for (entry in entries) {
+            val strategy = entry.strategy
+            val priceData = strategyPriceData[strategy.id!!] ?: StrategyPriceData()
+
+            // 根据方向更新价格
+            val newPriceData = if (entry.outcomeIndex == 0) {
+                // Up 方向
+                priceData.copy(
+                    currentPriceUp = bestBid,
+                    currentPriceDown = BigDecimal.ONE.subtract(bestBid),
+                    spreadUp = BigDecimal.ONE.subtract(bestBid),
+                    spreadDown = bestBid,
+                    lastUpdateTime = System.currentTimeMillis()
+                )
+            } else {
+                // Down 方向
+                priceData.copy(
+                    currentPriceDown = bestBid,
+                    currentPriceUp = BigDecimal.ONE.subtract(bestBid),
+                    spreadUp = bestBid,
+                    spreadDown = BigDecimal.ONE.subtract(bestBid),
+                    lastUpdateTime = System.currentTimeMillis()
+                )
+            }
+
+            strategyPriceData[strategy.id!!] = newPriceData
+
+            val pushData = buildPushData(strategy, newPriceData)
+            addToHistoryAndPush(strategy.id!!, pushData)
+        }
+    }
+
+    private fun addToHistoryAndPush(strategyId: Long, pushData: CryptoTailMonitorPushData) {
+        addToHistory(strategyId, pushData)
+        webSocketSubscriptionService.pushMonitorData(strategyId, pushData)
+    }
+
+    private fun addToHistory(strategyId: Long, pushData: CryptoTailMonitorPushData) {
+        val list = strategyPushHistory.getOrPut(strategyId) {
+            Collections.synchronizedList(mutableListOf<CryptoTailMonitorPushData>())
+        }
+        synchronized(list) {
+            val lastPeriod = strategyHistoryPeriod[strategyId]
+            if (lastPeriod != null && lastPeriod != pushData.periodStartUnix) {
+                list.clear()
+            }
+            strategyHistoryPeriod[strategyId] = pushData.periodStartUnix
+            list.add(pushData)
+            while (list.size > maxHistorySize) {
+                list.removeAt(0)
+            }
+        }
+    }
+
+    /**
+     * 构建推送数据
+     * 最新价、价差使用币安 K 线的 BTC 价格（open/close）
+     */
+    private fun buildPushData(strategy: CryptoTailStrategy, priceData: StrategyPriceData): CryptoTailMonitorPushData {
+        val nowSeconds = System.currentTimeMillis() / 1000
+        val periodStartUnix = (nowSeconds / strategy.intervalSeconds) * strategy.intervalSeconds
+        val periodEndUnix = periodStartUnix + strategy.intervalSeconds
+        val remainingSeconds = (periodEndUnix - nowSeconds).toInt().coerceAtLeast(0)
+
+        val windowStart = periodStartUnix + strategy.windowStartSeconds
+        val windowEnd = periodStartUnix + strategy.windowEndSeconds
+        val inTimeWindow = nowSeconds >= windowStart && nowSeconds < windowEnd
+
+        // 币安 K 线：open = 周期开盘价，close = 当前最新价（实时更新）
+        val openClose = binanceKlineService.getCurrentOpenClose(strategy.marketSlugPrefix, strategy.intervalSeconds, periodStartUnix)
+        val openPriceBtc = priceData.openPriceBtc ?: openClose?.first
+        val currentPriceBtc = openClose?.second
+        // K 线数据回来后更新缓存，供后续使用
+        if (openPriceBtc != null && priceData.openPriceBtc == null && strategy.id != null) {
+            strategyPriceData[strategy.id] = priceData.copy(openPriceBtc = openPriceBtc)
+        }
+        val spreadBtc = if (openPriceBtc != null && currentPriceBtc != null) {
+            currentPriceBtc.subtract(openPriceBtc)
+        } else null
+
+        // 判断价格区间（Polymarket 0-1）
+        val currentUp = priceData.currentPriceUp
+        val currentDown = priceData.currentPriceDown
+        val inPriceRangeUp = currentUp != null &&
+            currentUp >= strategy.minPrice && currentUp <= strategy.maxPrice
+        val inPriceRangeDown = currentDown != null &&
+            currentDown >= strategy.minPrice && currentDown <= strategy.maxPrice
+
+        return CryptoTailMonitorPushData(
+            strategyId = strategy.id!!,
+            timestamp = System.currentTimeMillis(),
+            periodStartUnix = periodStartUnix,
+            currentPriceUp = priceData.currentPriceUp?.setScale(4, RoundingMode.HALF_UP)?.toPlainString(),
+            currentPriceDown = priceData.currentPriceDown?.setScale(4, RoundingMode.HALF_UP)?.toPlainString(),
+            spreadUp = priceData.spreadUp?.setScale(4, RoundingMode.HALF_UP)?.toPlainString(),
+            spreadDown = priceData.spreadDown?.setScale(4, RoundingMode.HALF_UP)?.toPlainString(),
+            minSpreadLineUp = priceData.minSpreadLineUp?.setScale(2, RoundingMode.HALF_UP)?.toPlainString(),
+            minSpreadLineDown = priceData.minSpreadLineDown?.setScale(2, RoundingMode.HALF_UP)?.toPlainString(),
+            openPriceBtc = openPriceBtc?.setScale(2, RoundingMode.HALF_UP)?.toPlainString(),
+            currentPriceBtc = currentPriceBtc?.setScale(2, RoundingMode.HALF_UP)?.toPlainString(),
+            spreadBtc = spreadBtc?.setScale(2, RoundingMode.HALF_UP)?.toPlainString(),
+            remainingSeconds = remainingSeconds,
+            inTimeWindow = inTimeWindow,
+            inPriceRangeUp = inPriceRangeUp,
+            inPriceRangeDown = inPriceRangeDown,
+            triggered = priceData.triggered,
+            triggerDirection = priceData.triggerDirection,
+            periodEnded = remainingSeconds <= 0
+        )
+    }
+
+    private fun maybeRefreshSubscriptionIfPeriodChanged() {
+        val subscribed = currentPeriodTokenToStrategy.get().values.flatten().distinctBy { it.strategyId }
+            .associate { it.strategyId to it.periodStartUnix }
+        if (subscribed.isEmpty()) return
+
+        val strategies = strategyRepository.findAllById(subscribed.keys)
+        val nowSeconds = System.currentTimeMillis() / 1000
+
+        for (s in strategies) {
+            if (s.id == null) continue
+            val currentPeriod = (nowSeconds / s.intervalSeconds) * s.intervalSeconds
+            val subPeriod = subscribed[s.id] ?: continue
+            if (currentPeriod != subPeriod) {
+                scope.launch { refreshSubscription() }
+                return
+            }
+        }
+    }
+
+    private fun scheduleRefreshAtPeriodEnd(newMap: Map<String, List<MonitorEntry>>) {
+        val entries = newMap.values.flatten()
+        if (entries.isEmpty()) return
+
+        val nextPeriodEndSeconds = entries.minOf { it.periodStartUnix + it.strategy.intervalSeconds }
+        val delayMs = (nextPeriodEndSeconds * 1000) - System.currentTimeMillis() + 2000
+        if (delayMs <= 0) return
+
+        periodEndCountdownJob = scope.launch {
+            delay(delayMs)
+            periodEndCountdownJob = null
+            refreshSubscription()
+        }
+    }
+
+    private fun closeWebSocketForNoSubscribers() {
+        closeAllWebSockets()
+    }
+
+    private fun scheduleReconnect() {
+        if (reconnectJob?.isActive == true) return
+        reconnectJob = scope.launch {
+            delay(reconnectDelayMs)
+            reconnectJob = null
+            if (strategySubscribers.isNotEmpty()) {
+                logger.info("尾盘监控 WebSocket 尝试重连")
+                refreshSubscription()
+            }
+        }
+    }
+
+    private fun fetchEventBySlug(slug: String): Result<GammaEventBySlugResponse> {
+        return try {
+            val api = retrofitFactory.createGammaApi()
+            val response = runBlocking { api.getEventBySlug(slug) }
+            if (response.isSuccessful && response.body() != null) {
+                Result.success(response.body()!!)
+            } else {
+                Result.failure(Exception("${response.code()}"))
+            }
+        } catch (e: Exception) {
+            Result.failure(e)
+        }
+    }
+
+    private fun parseClobTokenIds(clobTokenIds: String?): List<String> {
+        if (clobTokenIds.isNullOrBlank()) return emptyList()
+        return clobTokenIds.fromJson<List<String>>() ?: emptyList()
+    }
+
+    @PreDestroy
+    fun destroy() {
+        reconnectJob?.cancel()
+        periodEndCountdownJob?.cancel()
+        periodicPushJob?.cancel()
+        currentPeriodWebSocket?.close(1000, "shutdown")
+        currentPeriodWebSocket = null
+        nextPeriodWebSocket?.close(1000, "shutdown")
+        nextPeriodWebSocket = null
+    }
+}

backend/src/main/kotlin/com/wrbug/polymarketbot/service/cryptotail/CryptoTailOrderNotificationPollingService.kt

@@ -102,16 +102,16 @@ class CryptoTailOrderNotificationPollingService(
             return false
         }
         val apiSecret = try {
-            cryptoUtils.decrypt(account.apiSecret) ?: return false
+            cryptoUtils.decrypt(account.apiSecret)
         } catch (e: Exception) {
             logger.warn("解密 API Secret 失败: accountId=${account.id}", e)
             return false
         }
         val apiPassphrase = try {
-            cryptoUtils.decrypt(account.apiPassphrase) ?: ""
+            cryptoUtils.decrypt(account.apiPassphrase)
         } catch (e: Exception) { "" }
         val clobApi = retrofitFactory.createClobApi(
-            account.apiKey!!,
+            account.apiKey,
             apiSecret,
             apiPassphrase,
             account.walletAddress

backend/src/main/kotlin/com/wrbug/polymarketbot/service/cryptotail/CryptoTailSettlementService.kt

@@ -228,11 +228,11 @@ class CryptoTailSettlementService(
             val match = activities.firstOrNull { a ->
                 a.type == "TRADE" &&
                     a.conditionId == conditionId &&
-                    a.outcomeIndex != null && a.outcomeIndex!! in 0..1 &&
+                    a.outcomeIndex != null && a.outcomeIndex in 0..1 &&
                     a.outcomeIndex == trigger.outcomeIndex &&
                     a.side?.uppercase() == "BUY" &&
-                    a.price != null && a.price!! > 0 &&
+                    a.price != null && a.price > 0 &&
-                    a.size != null && a.size!! > 0
+                    a.size != null && a.size > 0
             } ?: run {
                 logger.debug("尾盘结算 activity 无匹配成交: triggerId=${trigger.id}, conditionId=$conditionId, outcomeIndex=${trigger.outcomeIndex}, 条数=${activities.size}")
                 return null

backend/src/main/kotlin/com/wrbug/polymarketbot/service/cryptotail/CryptoTailStrategyExecutionService.kt

@@ -135,13 +135,17 @@ class CryptoTailStrategyExecutionService(
             return null
         }
         val apiSecret = try {
-            account.apiSecret?.let { cryptoUtils.decrypt(it) } ?: ""
+            account.apiSecret.let { cryptoUtils.decrypt(it) }
-        } catch (e: Exception) { "" }
+        } catch (e: Exception) {
+            ""
+        }
         val apiPassphrase = try {
-            account.apiPassphrase?.let { cryptoUtils.decrypt(it) } ?: ""
+            account.apiPassphrase.let { cryptoUtils.decrypt(it) }
-        } catch (e: Exception) { "" }
+        } catch (e: Exception) {
+            ""
+        }
 
-        val clobApi = retrofitFactory.createClobApi(account.apiKey!!, apiSecret, apiPassphrase, account.walletAddress)
+        val clobApi = retrofitFactory.createClobApi(account.apiKey, apiSecret, apiPassphrase, account.walletAddress)
         val feeRateByTokenId = tokenIds.associate { tokenId ->
             tokenId to (clobService.getFeeRate(tokenId).getOrNull()?.toString() ?: "0")
         }
@@ -211,11 +215,19 @@ class CryptoTailStrategyExecutionService(
 
         val mutex = getTriggerMutex(strategy.id!!, periodStartUnix)
         mutex.withLock {
-            if (triggerRepository.findByStrategyIdAndPeriodStartUnix(strategy.id!!, periodStartUnix) != null) return@withLock
+            if (triggerRepository.findByStrategyIdAndPeriodStartUnix(
+                    strategy.id!!,
+                    periodStartUnix
+                ) != null
+            ) return@withLock
             val logKey = triggerLockKey(strategy.id!!, periodStartUnix)
             if (conditionLoggedCache.getIfPresent(logKey) == null) {
                 conditionLoggedCache.put(logKey, periodStartUnix + strategy.intervalSeconds)
-                val oc = binanceKlineService.getCurrentOpenClose(strategy.marketSlugPrefix, strategy.intervalSeconds, periodStartUnix)
+                val oc = binanceKlineService.getCurrentOpenClose(
+                    strategy.marketSlugPrefix,
+                    strategy.intervalSeconds,
+                    periodStartUnix
+                )
                 val openPrice = oc?.first?.toPlainString() ?: "-"
                 val closePrice = oc?.second?.toPlainString() ?: "-"
                 val strategyName = strategy.name?.takeIf { it.isNotBlank() } ?: "尾盘策略-${strategy.marketSlugPrefix}"
@@ -223,8 +235,8 @@ class CryptoTailStrategyExecutionService(
                 val modeStr = if (strategy.spreadDirection == SpreadDirection.MAX) "最大价差" else "最小价差"
                 logger.info(
                     "尾盘策略首次满足条件: strategyName=$strategyName, strategyId=${strategy.id}, " +
-                        "openPrice=$openPrice, closePrice=$closePrice, marketPrice=${bestBid.toPlainString()}, " +
+                            "openPrice=$openPrice, closePrice=$closePrice, marketPrice=${bestBid.toPlainString()}, " +
-                        "direction=$direction, outcomeIndex=$outcomeIndex, spreadMode=$modeStr"
+                            "direction=$direction, outcomeIndex=$outcomeIndex, spreadMode=$modeStr"
                 )
             }
             if (!passSpreadCheck(strategy, periodStartUnix, outcomeIndex)) return@withLock
@@ -235,7 +247,11 @@ class CryptoTailStrategyExecutionService(
 
     private fun passSpreadCheck(strategy: CryptoTailStrategy, periodStartUnix: Long, outcomeIndex: Int): Boolean {
         if (strategy.spreadMode == SpreadMode.NONE) return true
-        val oc = binanceKlineService.getCurrentOpenClose(strategy.marketSlugPrefix, strategy.intervalSeconds, periodStartUnix)
+        val oc = binanceKlineService.getCurrentOpenClose(
+            strategy.marketSlugPrefix,
+            strategy.intervalSeconds,
+            periodStartUnix
+        )
             ?: return false
         val (openP, closeP) = oc
         val spreadAbs = closeP.subtract(openP).abs()
@@ -245,10 +261,12 @@ class CryptoTailStrategyExecutionService(
             SpreadMode.FIXED -> {
                 strategy.spreadValue?.takeIf { it > BigDecimal.ZERO } ?: return true
             }
+
             SpreadMode.AUTO -> {
                 val result = computeAutoEffectiveSpread(strategy, periodStartUnix, outcomeIndex) ?: return true
                 result.effectiveSpread.takeIf { it > BigDecimal.ZERO } ?: return true
             }
+
             SpreadMode.NONE -> return true
         }
 
@@ -271,9 +289,22 @@ class CryptoTailStrategyExecutionService(
         val effectiveSpread: BigDecimal
     )
 
-    private fun computeAutoEffectiveSpread(strategy: CryptoTailStrategy, periodStartUnix: Long, outcomeIndex: Int): AutoSpreadResult? {
+    private fun computeAutoEffectiveSpread(
-        val baseSpread = binanceKlineAutoSpreadService.getAutoMinSpreadBase(strategy.marketSlugPrefix, strategy.intervalSeconds, periodStartUnix, outcomeIndex)
+        strategy: CryptoTailStrategy,
-            ?: binanceKlineAutoSpreadService.computeAndCache(strategy.marketSlugPrefix, strategy.intervalSeconds, periodStartUnix)?.let { if (outcomeIndex == 0) it.first else it.second }
+        periodStartUnix: Long,
+        outcomeIndex: Int
+    ): AutoSpreadResult? {
+        val baseSpread = binanceKlineAutoSpreadService.getAutoMinSpreadBase(
+            strategy.marketSlugPrefix,
+            strategy.intervalSeconds,
+            periodStartUnix,
+            outcomeIndex
+        )
+            ?: binanceKlineAutoSpreadService.computeAndCache(
+                strategy.marketSlugPrefix,
+                strategy.intervalSeconds,
+                periodStartUnix
+            )?.let { if (outcomeIndex == 0) it.first else it.second }
             ?: return null
         if (baseSpread <= BigDecimal.ZERO) return null
         val windowStartMs = (periodStartUnix + strategy.windowStartSeconds) * 1000L
@@ -306,18 +337,40 @@ class CryptoTailStrategyExecutionService(
             val amountUsdc = when (strategy.amountMode.uppercase()) {
                 "RATIO" -> {
                     val balanceResult = accountService.getAccountBalance(ctx.account.id)
-                    val availableBalance = balanceResult.getOrNull()?.availableBalance?.toSafeBigDecimal() ?: BigDecimal.ZERO
+                    val availableBalance =
+                        balanceResult.getOrNull()?.availableBalance?.toSafeBigDecimal() ?: BigDecimal.ZERO
                     availableBalance.multiply(strategy.amountValue).divide(BigDecimal("100"), 18, RoundingMode.DOWN)
                 }
+
                 else -> strategy.amountValue
             }
             if (amountUsdc < BigDecimal("1")) {
-                saveTriggerRecord(strategy, periodStartUnix, marketTitle, outcomeIndex, triggerPrice, amountUsdc, null, "fail", "投入金额不足")
+                saveTriggerRecord(
+                    strategy,
+                    periodStartUnix,
+                    marketTitle,
+                    outcomeIndex,
+                    triggerPrice,
+                    amountUsdc,
+                    null,
+                    "fail",
+                    "投入金额不足"
+                )
                 return
             }
 
             val tokenId = tokenIds.getOrNull(outcomeIndex) ?: run {
-                saveTriggerRecord(strategy, periodStartUnix, marketTitle, outcomeIndex, triggerPrice, amountUsdc, null, "fail", "tokenIds 越界")
+                saveTriggerRecord(
+                    strategy,
+                    periodStartUnix,
+                    marketTitle,
+                    outcomeIndex,
+                    triggerPrice,
+                    amountUsdc,
+                    null,
+                    "fail",
+                    "tokenIds 越界"
+                )
                 return
             }
 
@@ -350,7 +403,16 @@ class CryptoTailStrategyExecutionService(
                 orderType = "FAK",
                 deferExec = false
             )
-            submitOrderAndSaveRecord(ctx.clobApi, strategy, periodStartUnix, marketTitle, outcomeIndex, triggerPrice, amountUsdc, orderRequest)
+            submitOrderAndSaveRecord(
+                ctx.clobApi,
+                strategy,
+                periodStartUnix,
+                marketTitle,
+                outcomeIndex,
+                triggerPrice,
+                amountUsdc,
+                orderRequest
+            )
             return
         }
 
@@ -373,7 +435,17 @@ class CryptoTailStrategyExecutionService(
             if (response.isSuccessful && response.body() != null) {
                 val body = response.body()!!
                 if (body.success && body.orderId != null) {
-                    saveTriggerRecord(strategy, periodStartUnix, marketTitle, outcomeIndex, triggerPrice, amountUsdc, body.orderId, "success", null)
+                    saveTriggerRecord(
+                        strategy,
+                        periodStartUnix,
+                        marketTitle,
+                        outcomeIndex,
+                        triggerPrice,
+                        amountUsdc,
+                        body.orderId,
+                        "success",
+                        null
+                    )
                     logger.info("尾盘策略下单成功: strategyId=${strategy.id}, periodStartUnix=$periodStartUnix, outcomeIndex=$outcomeIndex, orderId=${body.orderId}")
                     return
                 }
@@ -386,7 +458,17 @@ class CryptoTailStrategyExecutionService(
             failReason = e.message ?: e.toString()
             logger.error("尾盘策略下单异常: strategyId=${strategy.id}, periodStartUnix=$periodStartUnix", e)
         }
-        saveTriggerRecord(strategy, periodStartUnix, marketTitle, outcomeIndex, triggerPrice, amountUsdc, null, "fail", failReason)
+        saveTriggerRecord(
+            strategy,
+            periodStartUnix,
+            marketTitle,
+            outcomeIndex,
+            triggerPrice,
+            amountUsdc,
+            null,
+            "fail",
+            failReason
+        )
         logger.error("尾盘策略下单失败: strategyId=${strategy.id}, periodStartUnix=$periodStartUnix, reason=$failReason")
     }
 
@@ -401,12 +483,32 @@ class CryptoTailStrategyExecutionService(
     ) {
         val account = accountRepository.findById(strategy.accountId).orElse(null) ?: run {
             logger.warn("账户不存在: accountId=${strategy.accountId}")
-            saveTriggerRecord(strategy, periodStartUnix, marketTitle, outcomeIndex, triggerPrice, BigDecimal.ZERO, null, "fail", "账户不存在")
+            saveTriggerRecord(
+                strategy,
+                periodStartUnix,
+                marketTitle,
+                outcomeIndex,
+                triggerPrice,
+                BigDecimal.ZERO,
+                null,
+                "fail",
+                "账户不存在"
+            )
             return
         }
         if (account.apiKey == null || account.apiSecret == null || account.apiPassphrase == null) {
             logger.warn("账户未配置 API 凭证: accountId=${account.id}")
-            saveTriggerRecord(strategy, periodStartUnix, marketTitle, outcomeIndex, triggerPrice, BigDecimal.ZERO, null, "fail", "账户未配置API凭证")
+            saveTriggerRecord(
+                strategy,
+                periodStartUnix,
+                marketTitle,
+                outcomeIndex,
+                triggerPrice,
+                BigDecimal.ZERO,
+                null,
+                "fail",
+                "账户未配置API凭证"
+            )
             return
         }
 
@@ -417,12 +519,32 @@ class CryptoTailStrategyExecutionService(
             else -> strategy.amountValue
         }
         if (amountUsdc < BigDecimal("1")) {
-            saveTriggerRecord(strategy, periodStartUnix, marketTitle, outcomeIndex, triggerPrice, amountUsdc, null, "fail", "投入金额不足")
+            saveTriggerRecord(
+                strategy,
+                periodStartUnix,
+                marketTitle,
+                outcomeIndex,
+                triggerPrice,
+                amountUsdc,
+                null,
+                "fail",
+                "投入金额不足"
+            )
             return
         }
 
         val tokenId = tokenIds.getOrNull(outcomeIndex) ?: run {
-            saveTriggerRecord(strategy, periodStartUnix, marketTitle, outcomeIndex, triggerPrice, amountUsdc, null, "fail", "tokenIds 越界")
+            saveTriggerRecord(
+                strategy,
+                periodStartUnix,
+                marketTitle,
+                outcomeIndex,
+                triggerPrice,
+                amountUsdc,
+                null,
+                "fail",
+                "tokenIds 越界"
+            )
             return
         }
 
@@ -441,16 +563,30 @@ class CryptoTailStrategyExecutionService(
             cryptoUtils.decrypt(account.privateKey) ?: ""
         } catch (e: Exception) {
             logger.error("解密私钥失败: accountId=${account.id}", e)
-            saveTriggerRecord(strategy, periodStartUnix, marketTitle, outcomeIndex, triggerPrice, amountUsdc, null, "fail", "解密私钥失败")
+            saveTriggerRecord(
+                strategy,
+                periodStartUnix,
+                marketTitle,
+                outcomeIndex,
+                triggerPrice,
+                amountUsdc,
+                null,
+                "fail",
+                "解密私钥失败"
+            )
             return
         }
         val apiSecret = try {
-            account.apiSecret?.let { cryptoUtils.decrypt(it) } ?: ""
+            account.apiSecret.let { cryptoUtils.decrypt(it) }
-        } catch (e: Exception) { "" }
+        } catch (e: Exception) {
+            ""
+        }
         val apiPassphrase = try {
-            account.apiPassphrase?.let { cryptoUtils.decrypt(it) } ?: ""
+            account.apiPassphrase.let { cryptoUtils.decrypt(it) }
-        } catch (e: Exception) { "" }
+        } catch (e: Exception) {
-        val clobApi = retrofitFactory.createClobApi(account.apiKey!!, apiSecret, apiPassphrase, account.walletAddress)
+            ""
+        }
+        val clobApi = retrofitFactory.createClobApi(account.apiKey, apiSecret, apiPassphrase, account.walletAddress)
         val feeRateBps = clobService.getFeeRate(tokenId).getOrNull()?.toString() ?: "0"
         val signatureType = orderSigningService.getSignatureTypeForWalletType(account.walletType)
 
@@ -472,7 +608,16 @@ class CryptoTailStrategyExecutionService(
             orderType = "FAK",
             deferExec = false
         )
-        submitOrderAndSaveRecord(clobApi, strategy, periodStartUnix, marketTitle, outcomeIndex, triggerPrice, amountUsdc, orderRequest)
+        submitOrderAndSaveRecord(
+            clobApi,
+            strategy,
+            periodStartUnix,
+            marketTitle,
+            outcomeIndex,
+            triggerPrice,
+            amountUsdc,
+            orderRequest
+        )
     }
 
     private suspend fun fetchEventBySlug(slug: String): Result<GammaEventBySlugResponse> {

frontend/src/App.tsx

@@ -35,6 +35,7 @@ import Announcements from './pages/Announcements'
 import BacktestList from './pages/BacktestList'
 import BacktestDetail from './pages/BacktestDetail'
 import CryptoTailStrategyList from './pages/CryptoTailStrategyList'
+import CryptoTailMonitor from './pages/CryptoTailMonitor'
 import { wsManager } from './services/websocket'
 import type { OrderPushMessage } from './types'
 import { apiService } from './services/api'
@@ -252,6 +253,7 @@ function App() {
           <Route path="/templates/edit/:id" element={<ProtectedRoute><TemplateEdit /></ProtectedRoute>} />
           <Route path="/copy-trading" element={<ProtectedRoute><CopyTradingList /></ProtectedRoute>} />
           <Route path="/crypto-tail-strategy" element={<ProtectedRoute><CryptoTailStrategyList /></ProtectedRoute>} />
+          <Route path="/crypto-tail-monitor" element={<ProtectedRoute><CryptoTailMonitor /></ProtectedRoute>} />
           <Route path="/copy-trading/statistics/:copyTradingId" element={<ProtectedRoute><CopyTradingStatistics /></ProtectedRoute>} />
           {/* 保留旧路由以保持向后兼容 */}
           <Route path="/copy-trading/orders/buy/:copyTradingId" element={<ProtectedRoute><CopyTradingBuyOrders /></ProtectedRoute>} />

frontend/src/components/Layout.tsx

@@ -162,6 +162,11 @@ const Layout: React.FC<LayoutProps> = ({ children }) => {
       icon: <LineChartOutlined />,
       label: t('menu.cryptoTailStrategy')
     },
+    {
+      key: '/crypto-tail-monitor',
+      icon: <LineChartOutlined />,
+      label: t('menu.cryptoTailMonitor')
+    },
     {
       key: '/positions',
       icon: <UnorderedListOutlined />,

frontend/src/locales/en/common.json

@@ -313,6 +313,7 @@
     "templates": "Templates",
     "copyTradingConfig": "Copy Trading Config",
     "cryptoTailStrategy": "Tail Strategy",
+    "cryptoTailMonitor": "Tail Monitor",
     "positions": "Position Management",
     "backtest": "Backtest",
     "statistics": "Statistics",
@@ -1541,5 +1542,57 @@
       "emptyFail": "No failed records",
       "totalCount": "{count} record(s)"
     }
+  },
+  "cryptoTailMonitor": {
+    "title": "Tail Strategy Monitor",
+    "selectStrategy": "Strategy",
+    "selectStrategyPlaceholder": "Select a strategy to monitor",
+    "direction": "Direction",
+    "directionUp": "Up",
+    "directionDown": "Down",
+    "noData": "Select a strategy to start monitoring",
+    "priceRange": "Price Range",
+    "timeWindow": "Time Window",
+    "stat": {
+      "openPrice": "Open Price",
+      "currentPrice": "Current Price",
+      "spread": "Spread",
+      "remainingTime": "Remaining",
+      "configuredSpread": "Configured Spread",
+      "configuredSpreadMin": "Min Spread",
+      "configuredSpreadMax": "Max Spread",
+      "status": "Status",
+      "minSpreadLine": "Min Spread",
+      "periodSpreadMinMax": "Period Spread",
+      "periodSpreadMin": "Period Min Spread",
+      "periodSpreadMax": "Period Max Spread",
+      "minSpread": "Min",
+      "maxSpread": "Max"
+    },
+    "status": {
+      "triggered": "Triggered",
+      "periodEnded": "Period Ended",
+      "inCondition": "In Condition",
+      "waiting": "Waiting"
+    },
+    "chart": {
+      "title": "Price Chart",
+      "btcTitle": "BTC Price Chart",
+      "marketTitle": "Market Price Chart",
+      "price": "BTC Price",
+      "openPrice": "Open",
+      "spread": "Spread",
+      "minSpreadLine": "Min Spread Line",
+      "marketUp": "Up",
+      "marketDown": "Down",
+      "time": "Time"
+    },
+    "strategyInfo": {
+      "title": "Strategy Info",
+      "market": "Market",
+      "interval": "Interval",
+      "account": "Account",
+      "spreadMode": "Spread Mode"
+    }
   }
 }

frontend/src/locales/zh-CN/common.json

@@ -312,6 +312,7 @@
     "templates": "跟单模板",
     "copyTradingConfig": "跟单配置",
     "cryptoTailStrategy": "尾盘策略",
+    "cryptoTailMonitor": "尾盘监控",
     "positions": "仓位管理",
     "backtest": "回测",
     "statistics": "统计信息",
@@ -1540,5 +1541,57 @@
       "emptyFail": "暂无失败记录",
       "totalCount": "共 {count} 条"
     }
+  },
+  "cryptoTailMonitor": {
+    "title": "尾盘策略监控",
+    "selectStrategy": "选择策略",
+    "selectStrategyPlaceholder": "请选择要监控的策略",
+    "direction": "监控方向",
+    "directionUp": "Up",
+    "directionDown": "Down",
+    "noData": "请选择一个策略开始监控",
+    "priceRange": "价格区间",
+    "timeWindow": "时间窗口",
+    "stat": {
+      "openPrice": "开盘价",
+      "currentPrice": "最新价",
+      "spread": "价差",
+      "remainingTime": "剩余时间",
+      "configuredSpread": "配置价差",
+      "configuredSpreadMin": "最小价差",
+      "configuredSpreadMax": "最大价差",
+      "status": "状态",
+      "minSpreadLine": "最小价差线",
+      "periodSpreadMinMax": "周期内价差",
+      "periodSpreadMin": "周期内最小价差",
+      "periodSpreadMax": "周期内最大价差",
+      "minSpread": "最小",
+      "maxSpread": "最大"
+    },
+    "status": {
+      "triggered": "已触发",
+      "periodEnded": "周期结束",
+      "inCondition": "满足条件",
+      "waiting": "等待中"
+    },
+    "chart": {
+      "title": "分时图",
+      "btcTitle": "BTC 分时图",
+      "marketTitle": "市场分时图",
+      "price": "BTC 价格",
+      "openPrice": "开盘价",
+      "spread": "价差",
+      "minSpreadLine": "最小价差线",
+      "marketUp": "Up",
+      "marketDown": "Down",
+      "time": "时间"
+    },
+    "strategyInfo": {
+      "title": "策略信息",
+      "market": "市场",
+      "interval": "周期",
+      "account": "账户",
+      "spreadMode": "价差模式"
+    }
   }
 }

frontend/src/locales/zh-TW/common.json

@@ -313,6 +313,7 @@
     "templates": "跟單模板",
     "copyTradingConfig": "跟單配置",
     "cryptoTailStrategy": "尾盤策略",
+    "cryptoTailMonitor": "尾盤監控",
     "positions": "倉位管理",
     "backtest": "回測",
     "statistics": "統計信息",
@@ -1541,5 +1542,57 @@
       "emptyFail": "暫無失敗記錄",
       "totalCount": "共 {count} 條"
     }
+  },
+  "cryptoTailMonitor": {
+    "title": "尾盤策略監控",
+    "selectStrategy": "選擇策略",
+    "selectStrategyPlaceholder": "請選擇要監控的策略",
+    "direction": "監控方向",
+    "directionUp": "Up",
+    "directionDown": "Down",
+    "noData": "請選擇一個策略開始監控",
+    "priceRange": "價格區間",
+    "timeWindow": "時間窗口",
+    "stat": {
+      "openPrice": "開盤價",
+      "currentPrice": "最新價",
+      "spread": "價差",
+      "remainingTime": "剩餘時間",
+      "configuredSpread": "配置價差",
+      "configuredSpreadMin": "最小價差",
+      "configuredSpreadMax": "最大價差",
+      "status": "狀態",
+      "minSpreadLine": "最小價差線",
+      "periodSpreadMinMax": "週期內價差",
+      "periodSpreadMin": "週期內最小價差",
+      "periodSpreadMax": "週期內最大價差",
+      "minSpread": "最小",
+      "maxSpread": "最大"
+    },
+    "status": {
+      "triggered": "已觸發",
+      "periodEnded": "週期結束",
+      "inCondition": "滿足條件",
+      "waiting": "等待中"
+    },
+    "chart": {
+      "title": "分時圖",
+      "btcTitle": "BTC 分時圖",
+      "marketTitle": "市場分時圖",
+      "price": "BTC 價格",
+      "openPrice": "開盤價",
+      "spread": "價差",
+      "minSpreadLine": "最小價差線",
+      "marketUp": "Up",
+      "marketDown": "Down",
+      "time": "時間"
+    },
+    "strategyInfo": {
+      "title": "策略信息",
+      "market": "市場",
+      "interval": "週期",
+      "account": "賬戶",
+      "spreadMode": "價差模式"
+    }
   }
 }

frontend/src/pages/CryptoTailMonitor.tsx

@@ -0,0 +1,678 @@
+import { useEffect, useState, useRef, useCallback } from 'react'
+import {
+  Card,
+  Select,
+  Space,
+  Statistic,
+  Row,
+  Col,
+  Typography,
+  Spin,
+  Empty,
+  Alert
+} from 'antd'
+import { ClockCircleOutlined } from '@ant-design/icons'
+import { useTranslation } from 'react-i18next'
+import { useMediaQuery } from 'react-responsive'
+import * as echarts from 'echarts'
+import type { EChartsOption } from 'echarts'
+import { apiService } from '../services/api'
+import { useWebSocketSubscription } from '../hooks/useWebSocket'
+import { formatNumber } from '../utils'
+import type {
+  CryptoTailStrategyDto,
+  CryptoTailMonitorInitResponse,
+  CryptoTailMonitorPushData
+} from '../types'
+
+const { Title, Text } = Typography
+
+/** 分时图数据点：时间戳、BTC 价格 USDC、市场 Up/Down 价格 0-1 */
+interface PriceDataPoint {
+  time: number
+  btcPrice: number | null
+  marketPriceUp: number | null
+  marketPriceDown: number | null
+}
+
+const CryptoTailMonitor: React.FC = () => {
+  const { t } = useTranslation()
+  const isMobile = useMediaQuery({ maxWidth: 768 })
+
+  // 策略列表
+  const [strategies, setStrategies] = useState<CryptoTailStrategyDto[]>([])
+  const [strategiesLoading, setStrategiesLoading] = useState(false)
+
+  // 选中的策略
+  const [selectedStrategyId, setSelectedStrategyId] = useState<number | null>(null)
+
+  // 监控数据
+  const [initData, setInitData] = useState<CryptoTailMonitorInitResponse | null>(null)
+  const [pushData, setPushData] = useState<CryptoTailMonitorPushData | null>(null)
+  const [initLoading, setInitLoading] = useState(false)
+
+  // 价格历史数据（用于分时图）
+  const [priceHistory, setPriceHistory] = useState<PriceDataPoint[]>([])
+  const chartRef = useRef<HTMLDivElement>(null)
+  const chartInstance = useRef<echarts.ECharts | null>(null)
+  const marketChartRef = useRef<HTMLDivElement>(null)
+  const marketChartInstance = useRef<echarts.ECharts | null>(null)
+  const lastPeriodStartRef = useRef<number | null>(null)
+  // 记录首次数据进入时间（用于中途进入时的横轴起点）
+  const [firstDataTime, setFirstDataTime] = useState<number | null>(null)
+  // 标记是否已切换过周期（切换后使用完整周期）
+  const [hasSwitchedPeriod, setHasSwitchedPeriod] = useState<boolean>(false)
+
+  // 获取策略列表
+  useEffect(() => {
+    const fetchStrategies = async () => {
+      setStrategiesLoading(true)
+      try {
+        const res = await apiService.cryptoTailStrategy.list({ enabled: true })
+        if (res.data.code === 0 && res.data.data) {
+          setStrategies(res.data.data.list ?? [])
+          // 自动选择第一个策略
+          if (res.data.data.list?.length > 0 && !selectedStrategyId) {
+            setSelectedStrategyId(res.data.data.list[0].id)
+          }
+        }
+      } catch (e) {
+        console.error('Failed to fetch strategies:', e)
+      } finally {
+        setStrategiesLoading(false)
+      }
+    }
+    fetchStrategies()
+  }, [])
+
+  // 初始化监控数据
+  useEffect(() => {
+    if (!selectedStrategyId) {
+      setInitData(null)
+      setPushData(null)
+      setPriceHistory([])
+      setFirstDataTime(null)
+      setHasSwitchedPeriod(false)
+      return
+    }
+
+    const initMonitor = async () => {
+      setInitLoading(true)
+      setPriceHistory([])
+      setFirstDataTime(null)
+      setHasSwitchedPeriod(false)
+      try {
+        const res = await apiService.cryptoTailStrategy.monitorInit(selectedStrategyId)
+        if (res.data.code === 0 && res.data.data) {
+          setInitData(res.data.data)
+        } else {
+          setInitData(null)
+        }
+      } catch (e) {
+        console.error('Failed to init monitor:', e)
+        setInitData(null)
+      } finally {
+        setInitLoading(false)
+      }
+    }
+    initMonitor()
+  }, [selectedStrategyId])
+
+  // WebSocket 订阅
+  const handlePushData = useCallback((data: CryptoTailMonitorPushData) => {
+    if (data.strategyId !== selectedStrategyId) return
+    setPushData(data)
+
+    const btcPrice = data.currentPriceBtc != null && data.currentPriceBtc !== ''
+      ? parseFloat(data.currentPriceBtc)
+      : null
+    const marketUp = data.currentPriceUp != null && data.currentPriceUp !== ''
+      ? parseFloat(data.currentPriceUp)
+      : null
+    const marketDown = data.currentPriceDown != null && data.currentPriceDown !== ''
+      ? parseFloat(data.currentPriceDown)
+      : null
+    const hasBtc = btcPrice != null && !Number.isNaN(btcPrice)
+    const hasMarket = (marketUp != null && !Number.isNaN(marketUp)) || (marketDown != null && !Number.isNaN(marketDown))
+    if (!hasBtc && !hasMarket) return
+
+    const newPoint: PriceDataPoint = {
+      time: data.timestamp,
+      btcPrice: hasBtc ? btcPrice : null,
+      marketPriceUp: hasMarket && marketUp != null && !Number.isNaN(marketUp) ? marketUp : null,
+      marketPriceDown: hasMarket && marketDown != null && !Number.isNaN(marketDown) ? marketDown : null
+    }
+
+    // 用 ref 检测周期切换，避免因依赖 initData 导致回调频繁重建
+    const pushPeriod = data.periodStartUnix
+    const lastPeriod = lastPeriodStartRef.current
+
+    if (pushPeriod != null && pushPeriod !== lastPeriod) {
+      // 新周期或首次推送：更新 ref 和 initData，清空历史
+      lastPeriodStartRef.current = pushPeriod
+      // 如果之前已经有周期数据，说明是周期切换，标记为已切换
+      if (lastPeriod != null) {
+        setHasSwitchedPeriod(true)
+      }
+      // 周期切换时重置首次数据时间
+      setFirstDataTime(newPoint.time)
+      setInitData(prev => prev ? { ...prev, periodStartUnix: pushPeriod } : null)
+      setPriceHistory([newPoint])
+    } else {
+      // 同周期：追加数据
+      // 记录首次数据时间（仅在中途进入且未切换过周期时记录）
+      setFirstDataTime(prev => {
+        if (prev == null) {
+          return newPoint.time
+        }
+        return prev
+      })
+      setPriceHistory(prev => {
+        const maxPoints = 300
+        const newHistory = [...prev, newPoint]
+        return newHistory.slice(-maxPoints)
+      })
+    }
+  }, [selectedStrategyId])
+
+  const channel = selectedStrategyId ? `crypto_tail_monitor_${selectedStrategyId}` : ''
+  useWebSocketSubscription(channel, handlePushData)
+
+  // 图表容器仅在 initData 存在时渲染，故在更新图表时懒初始化
+  useEffect(() => {
+    const handleResize = () => {
+      chartInstance.current?.resize()
+      marketChartInstance.current?.resize()
+    }
+    window.addEventListener('resize', handleResize)
+    return () => {
+      window.removeEventListener('resize', handleResize)
+      chartInstance.current?.dispose()
+      chartInstance.current = null
+      marketChartInstance.current?.dispose()
+      marketChartInstance.current = null
+    }
+  }, [])
+
+  // 更新图表：分时图为 BTC 价格 USDC
+  useEffect(() => {
+    if (!initData) return
+    if (chartRef.current && !chartInstance.current) {
+      chartInstance.current = echarts.init(chartRef.current)
+    }
+    if (!chartInstance.current) return
+
+    const periodStartMs = (initData.periodStartUnix ?? 0) * 1000
+    const periodEndMs = periodStartMs + (initData.intervalSeconds ?? 300) * 1000
+
+    // data.timestamp 为毫秒，firstDataTime 已是 ms，无需再乘 1000
+    const firstDataMs = firstDataTime != null ? firstDataTime : null
+    const isMidEntry = firstDataMs != null && !hasSwitchedPeriod && firstDataMs > periodStartMs
+    // 中途进入时横轴起点为进入时刻，否则为周期起点
+    const xAxisMin = isMidEntry ? firstDataMs : periodStartMs
+
+    const btcData: [number, number | null][] = priceHistory.length > 0
+      ? priceHistory.map(p => [p.time, p.btcPrice])
+      : []
+    const openBtc = pushData?.openPriceBtc ?? initData.openPriceBtc
+    const openBtcNum = openBtc != null ? parseFloat(openBtc) : null
+
+    const hasAnyBtcData = btcData.some(([, v]) => v != null && !Number.isNaN(v))
+    const btcPlaceholderTime = xAxisMin
+    const displayBtcData: [number, number | null][] = hasAnyBtcData
+      ? btcData
+      : (openBtcNum != null ? [[btcPlaceholderTime, openBtcNum]] : [])
+    const minSpreadUpRaw = pushData?.minSpreadLineUp ?? initData.autoMinSpreadUp
+    const minSpreadDownRaw = pushData?.minSpreadLineDown ?? initData.autoMinSpreadDown
+    const minSpreadUp = minSpreadUpRaw != null && minSpreadUpRaw !== '' ? parseFloat(minSpreadUpRaw) : null
+    const minSpreadDown = minSpreadDownRaw != null && minSpreadDownRaw !== '' ? parseFloat(minSpreadDownRaw) : null
+
+    const validPrices = displayBtcData.flatMap(([, v]) => (v != null && !Number.isNaN(v) ? [v] : []))
+    const defaultRange = 500
+    let yMin: number | undefined
+    let yMax: number | undefined
+    if (validPrices.length > 0) {
+      const dataMin = Math.min(...validPrices)
+      const dataMax = Math.max(...validPrices)
+      const dataRange = dataMax - dataMin
+      const minRange = Math.max(Math.abs(dataMax) * 0.01, 10)
+      const range = Math.max(dataRange, minRange)
+      const padding = range * 0.25
+      yMin = dataMin - padding
+      yMax = dataMax + padding
+    } else if (openBtcNum != null) {
+      const spread = minSpreadUp ?? minSpreadDown ?? defaultRange
+      const halfRange = spread * 1.5
+      yMin = openBtcNum - halfRange
+      yMax = openBtcNum + halfRange
+    }
+
+    const markLineData: Array<{ name: string; yAxis: number; lineStyle: { type: 'dashed'; color: string } }> = []
+    if (openBtcNum != null && !Number.isNaN(openBtcNum)) {
+      markLineData.push({
+        name: t('cryptoTailMonitor.chart.openPrice'),
+        yAxis: openBtcNum,
+        lineStyle: { type: 'dashed', color: '#999' }
+      })
+    }
+    if (openBtcNum != null && minSpreadUp != null && !Number.isNaN(minSpreadUp)) {
+      markLineData.push({
+        name: t('cryptoTailMonitor.chart.minSpreadLine') + ' Up',
+        yAxis: openBtcNum + minSpreadUp,
+        lineStyle: { type: 'dashed', color: '#ff4d4f' }
+      })
+    }
+    if (openBtcNum != null && minSpreadDown != null && !Number.isNaN(minSpreadDown)) {
+      markLineData.push({
+        name: t('cryptoTailMonitor.chart.minSpreadLine') + ' Down',
+        yAxis: openBtcNum - minSpreadDown,
+        lineStyle: { type: 'dashed', color: '#ff4d4f' }
+      })
+    }
+
+    const option: EChartsOption = {
+      tooltip: {
+        trigger: 'axis',
+        formatter: (params: unknown) => {
+          const arr = params as Array<{ seriesName: string; name: string; value: number | [number, number] }>
+          const priceParam = arr.find(p => p.seriesName === t('cryptoTailMonitor.chart.price'))
+          if (!priceParam) return ''
+          const val = Array.isArray(priceParam.value) ? priceParam.value[1] : priceParam.value
+          if (val == null || Number.isNaN(val)) return ''
+          const ts = priceParam.name as unknown as number
+          const offsetSec = Math.floor(ts / 1000) - (initData?.periodStartUnix ?? 0)
+          const mins = Math.floor(offsetSec / 60)
+          const secs = offsetSec % 60
+          const timeStr = `${mins.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`
+          return `
+            <div>
+              <div>${t('cryptoTailMonitor.chart.time')}: ${timeStr}</div>
+              <div>${t('cryptoTailMonitor.chart.price')}: ${Number(val).toFixed(2)} USDC</div>
+            </div>
+          `
+        }
+      },
+      legend: {
+        show: true,
+        top: 0
+      },
+      grid: {
+        left: '3%',
+        right: '4%',
+        bottom: '3%',
+        top: '12%',
+        containLabel: true
+      },
+      xAxis: {
+        type: 'time',
+        min: xAxisMin,
+        max: periodEndMs,
+        boundaryGap: false,
+        axisLabel: {
+          formatter: (val: number) => {
+            const offsetSec = Math.floor(val / 1000) - (initData.periodStartUnix ?? 0)
+            const mins = Math.floor(offsetSec / 60)
+            const secs = offsetSec % 60
+            return `${mins.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`
+          }
+        }
+      },
+      yAxis: {
+        type: 'value',
+        scale: true,
+        min: yMin,
+        max: yMax,
+        axisLabel: {
+          formatter: (value: number) => value.toFixed(0)
+        }
+      },
+      series: [
+        {
+          name: t('cryptoTailMonitor.chart.price'),
+          type: 'line',
+          data: displayBtcData,
+          smooth: true,
+          symbol: displayBtcData.length === 1 ? 'circle' : 'none',
+          symbolSize: 4,
+          lineStyle: { width: 2, color: '#1890ff' },
+          areaStyle: {
+            color: {
+              type: 'linear',
+              x: 0,
+              y: 0,
+              x2: 0,
+              y2: 1,
+              colorStops: [
+                { offset: 0, color: 'rgba(24, 144, 255, 0.3)' },
+                { offset: 1, color: 'rgba(24, 144, 255, 0.05)' }
+              ]
+            }
+          },
+          markLine: markLineData.length > 0 ? { data: markLineData } : undefined
+        }
+      ]
+    }
+
+    chartInstance.current.setOption(option, true)
+    chartInstance.current.resize()
+  }, [priceHistory, initData, pushData, firstDataTime, hasSwitchedPeriod, t])
+
+  // 更新市场分时图：Polymarket 价格 0-1
+  useEffect(() => {
+    if (!initData) return
+    if (marketChartRef.current && !marketChartInstance.current) {
+      marketChartInstance.current = echarts.init(marketChartRef.current)
+    }
+    if (!marketChartInstance.current) return
+
+    const periodStartMs = (initData.periodStartUnix ?? 0) * 1000
+    const periodEndMs = periodStartMs + (initData.intervalSeconds ?? 300) * 1000
+
+    // data.timestamp 为毫秒，firstDataTime 已是 ms，无需再乘 1000
+    const firstDataMs = firstDataTime != null ? firstDataTime : null
+    const isMidEntry = firstDataMs != null && !hasSwitchedPeriod && firstDataMs > periodStartMs
+    const xAxisMin = isMidEntry ? firstDataMs : periodStartMs
+
+    const toMs = (t: number) => (t > 0 && t < 1e12 ? t * 1000 : t)
+    const marketUpData: [number, number | null][] = priceHistory.length > 0
+      ? priceHistory.map(p => [toMs(p.time), p.marketPriceUp])
+      : []
+    const marketDownData: [number, number | null][] = priceHistory.length > 0
+      ? priceHistory.map(p => [toMs(p.time), p.marketPriceDown])
+      : []
+
+    const minPrice = parseFloat(initData.minPrice)
+    const maxPrice = parseFloat(initData.maxPrice)
+    const midPrice = (minPrice + maxPrice) / 2
+    const isValid = (v: number | null): v is number => v != null && !Number.isNaN(v)
+    const validUp: [number, number][] = marketUpData.filter((point): point is [number, number] => isValid(point[1]))
+    const validDown: [number, number][] = marketDownData.filter((point): point is [number, number] => isValid(point[1]))
+    const hasAnyMarketData = validUp.length > 0 || validDown.length > 0
+    const placeholderTime = xAxisMin
+    const finalMarketUp: [number, number][] = hasAnyMarketData ? validUp : [[placeholderTime, midPrice]]
+    const finalMarketDown: [number, number][] = hasAnyMarketData ? validDown : [[placeholderTime, midPrice]]
+
+    const option: EChartsOption = {
+      tooltip: {
+        trigger: 'axis',
+        formatter: (params: unknown) => {
+          const arr = params as Array<{ seriesName: string; name: string | number; value: number | [number, number] }>
+          const upParam = arr.find(p => p.seriesName === t('cryptoTailMonitor.chart.marketUp'))
+          const downParam = arr.find(p => p.seriesName === t('cryptoTailMonitor.chart.marketDown'))
+          const rawTime = arr[0]?.name
+          const timeStr = typeof rawTime === 'number' && initData
+            ? (() => {
+                const offsetSec = Math.floor(rawTime / 1000) - (initData.periodStartUnix ?? 0)
+                const mins = Math.floor(offsetSec / 60)
+                const secs = offsetSec % 60
+                return `${mins.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`
+              })()
+            : String(rawTime ?? '')
+          let html = `<div><div>${t('cryptoTailMonitor.chart.time')}: ${timeStr}</div>`
+          const upVal = Array.isArray(upParam?.value) ? upParam?.value[1] : upParam?.value
+          const downVal = Array.isArray(downParam?.value) ? downParam?.value[1] : downParam?.value
+          if (upVal != null && !Number.isNaN(upVal)) html += `<div>Up: ${Number(upVal).toFixed(4)}</div>`
+          if (downVal != null && !Number.isNaN(downVal)) html += `<div>Down: ${Number(downVal).toFixed(4)}</div>`
+          html += '</div>'
+          return html
+        }
+      },
+      legend: {
+        show: true,
+        top: 0,
+        data: [t('cryptoTailMonitor.chart.marketUp'), t('cryptoTailMonitor.chart.marketDown')]
+      },
+      grid: {
+        left: '3%',
+        right: '4%',
+        bottom: '3%',
+        top: '15%',
+        containLabel: true
+      },
+      xAxis: {
+        type: 'time',
+        min: xAxisMin,
+        max: periodEndMs,
+        boundaryGap: false,
+        axisLabel: {
+          formatter: (val: number) => {
+            const offsetSec = Math.floor(val / 1000) - (initData.periodStartUnix ?? 0)
+            const mins = Math.floor(offsetSec / 60)
+            const secs = offsetSec % 60
+            return `${mins.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`
+          }
+        }
+      },
+      yAxis: {
+        type: 'value',
+        min: 0,
+        max: 1,
+        interval: 0.2,
+        axisLabel: { formatter: (v: number) => v.toFixed(1) }
+      },
+      series: [
+        {
+          name: t('cryptoTailMonitor.chart.marketUp'),
+          type: 'line',
+          data: finalMarketUp,
+          smooth: true,
+          symbol: 'circle',
+          symbolSize: 4,
+          showSymbol: true,
+          connectNulls: true,
+          lineStyle: { width: 2, color: '#1890ff' },
+          itemStyle: { color: '#1890ff' },
+          markArea: {
+            silent: true,
+            itemStyle: { color: 'rgba(82, 196, 26, 0.12)' },
+            data: [[{ yAxis: minPrice }, { yAxis: maxPrice }]]
+          }
+        },
+        {
+          name: t('cryptoTailMonitor.chart.marketDown'),
+          type: 'line',
+          data: finalMarketDown,
+          smooth: true,
+          symbol: 'circle',
+          symbolSize: 4,
+          showSymbol: true,
+          connectNulls: true,
+          lineStyle: { width: 2, color: '#fa8c16' },
+          itemStyle: { color: '#fa8c16' }
+        }
+      ]
+    }
+
+    marketChartInstance.current.setOption(option, true)
+    marketChartInstance.current.resize()
+  }, [priceHistory, initData, firstDataTime, hasSwitchedPeriod, t])
+
+  // 格式化剩余时间
+  const formatRemainingTime = (seconds: number): string => {
+    const mins = Math.floor(seconds / 60)
+    const secs = seconds % 60
+    return `${mins}:${secs.toString().padStart(2, '0')}`
+  }
+
+  // 显示 BTC 价格（最新价、价差、开盘价均为 USDC）
+  const openPrice = pushData?.openPriceBtc ?? initData?.openPriceBtc
+  const currentPrice = pushData?.currentPriceBtc
+  const currentSpread = pushData?.spreadBtc
+  const minSpreadUpStr = pushData?.minSpreadLineUp ?? initData?.autoMinSpreadUp
+  const minSpreadDownStr = pushData?.minSpreadLineDown ?? initData?.autoMinSpreadDown
+  const minSpreadUpVal = minSpreadUpStr != null && minSpreadUpStr !== '' ? parseFloat(minSpreadUpStr) : null
+  const minSpreadDownVal = minSpreadDownStr != null && minSpreadDownStr !== '' ? parseFloat(minSpreadDownStr) : null
+  const minSpreadLineNum = [minSpreadUpVal, minSpreadDownVal].filter((v): v is number => v != null && !Number.isNaN(v))
+  const spreadBelowThreshold = currentSpread != null && currentSpread !== '' && minSpreadLineNum.length > 0 &&
+    parseFloat(currentSpread) < Math.min(...minSpreadLineNum)
+
+  return (
+    <div style={{ padding: isMobile ? 12 : 24 }}>
+      <Title level={2} style={{ marginBottom: 16, fontSize: isMobile ? 20 : 24 }}>
+        {t('cryptoTailMonitor.title')}
+      </Title>
+
+      {/* 顶部控制区 */}
+      <Card style={{ marginBottom: 16 }}>
+        <Space wrap size="middle">
+          <Space>
+            <Text strong>{t('cryptoTailMonitor.selectStrategy')}</Text>
+            <Select
+              style={{ minWidth: isMobile ? 200 : 300 }}
+              loading={strategiesLoading}
+              value={selectedStrategyId}
+              onChange={(id) => setSelectedStrategyId(id)}
+              placeholder={t('cryptoTailMonitor.selectStrategyPlaceholder')}
+              options={strategies.map(s => ({
+                label: `${s.name || s.marketSlugPrefix} (${s.intervalSeconds === 300 ? '5m' : '15m'})`,
+                value: s.id
+              }))}
+            />
+          </Space>
+        </Space>
+      </Card>
+
+      {initLoading ? (
+        <Spin spinning style={{ display: 'flex', justifyContent: 'center', padding: 100 }} />
+      ) : !initData ? (
+        <Empty description={t('cryptoTailMonitor.noData')} />
+      ) : (
+        <>
+          {/* 状态卡片：最小宽度填满整行，间距 16 */}
+          <Row gutter={16} style={{ marginBottom: 16 }}>
+            <Col flex="1" style={{ minWidth: 140 }}>
+              <Card size="small" style={{ width: '100%', minWidth: 0 }}>
+                <Statistic
+                  title={t('cryptoTailMonitor.stat.openPrice')}
+                  value={openPrice ? formatNumber(openPrice, 2) : '-'}
+                  precision={2}
+                />
+              </Card>
+            </Col>
+            <Col flex="1" style={{ minWidth: 140 }}>
+              <Card size="small" style={{ width: '100%', minWidth: 0 }}>
+                <Statistic
+                  title={t('cryptoTailMonitor.stat.currentPrice')}
+                  value={currentPrice ? formatNumber(currentPrice, 2) : '-'}
+                  precision={2}
+                  valueStyle={{ color: isMobile ? undefined : '#1890ff' }}
+                />
+              </Card>
+            </Col>
+            <Col flex="1" style={{ minWidth: 140 }}>
+              <Card size="small" style={{ width: '100%', minWidth: 0 }}>
+                <Statistic
+                  title={t('cryptoTailMonitor.stat.spread')}
+                  value={(() => {
+                    if (currentSpread == null || currentSpread === '') return '-'
+                    const num = parseFloat(currentSpread)
+                    if (Number.isNaN(num)) return '-'
+                    const formatted = formatNumber(currentSpread, 2)
+                    return num >= 0 ? `+${formatted}` : formatted
+                  })()}
+                  precision={2}
+                  valueStyle={{
+                    color: spreadBelowThreshold ? '#ff4d4f' : undefined
+                  }}
+                />
+              </Card>
+            </Col>
+            <Col flex="1" style={{ minWidth: 140 }}>
+              <Card size="small" style={{ width: '100%', minWidth: 0 }}>
+                <Statistic
+                  title={t('cryptoTailMonitor.stat.remainingTime')}
+                  value={pushData ? formatRemainingTime(pushData.remainingSeconds) : '-'}
+                  prefix={<ClockCircleOutlined />}
+                  valueStyle={{
+                    color: pushData && pushData.remainingSeconds < 60 ? '#ff4d4f' : undefined
+                  }}
+                />
+              </Card>
+            </Col>
+            <Col flex="1" style={{ minWidth: 140 }}>
+              <Card size="small" style={{ width: '100%', minWidth: 0 }}>
+                <Statistic
+                  title={(initData.spreadDirection ?? 'MIN') === 'MAX' ? t('cryptoTailMonitor.stat.configuredSpreadMax') : t('cryptoTailMonitor.stat.configuredSpreadMin')}
+                  valueRender={() => {
+                    const mode = initData.minSpreadMode ?? 'NONE'
+                    if (mode === 'NONE') return <Text type="secondary">-</Text>
+                    if (mode === 'FIXED') {
+                      const v = initData.minSpreadValue
+                      return v != null && v !== '' ? formatNumber(v, 2) : '-'
+                    }
+                    const up = minSpreadUpStr != null && minSpreadUpStr !== '' ? formatNumber(minSpreadUpStr, 2) : null
+                    const down = minSpreadDownStr != null && minSpreadDownStr !== '' ? formatNumber(minSpreadDownStr, 2) : null
+                    if (up == null && down == null) return <Text type="secondary">-</Text>
+                    return (
+                      <Text style={{ fontSize: 13, lineHeight: 1.4 }}>
+                        {up != null && <span style={{ display: 'block' }}>Up: {up}</span>}
+                        {down != null && <span style={{ display: 'block' }}>Down: {down}</span>}
+                      </Text>
+                    )
+                  }}
+                />
+              </Card>
+            </Col>
+          </Row>
+
+          {/* 价格区间提示 */}
+          <Alert
+            type="info"
+            showIcon
+            style={{ marginBottom: 16 }}
+            message={`${t('cryptoTailMonitor.priceRange')}: ${formatNumber(initData.minPrice, 2)} ~ ${formatNumber(initData.maxPrice, 2)} | ${t('cryptoTailMonitor.timeWindow')}: ${Math.floor(initData.windowStartSeconds / 60)}:${(initData.windowStartSeconds % 60).toString().padStart(2, '0')} ~ ${Math.floor(initData.windowEndSeconds / 60)}:${(initData.windowEndSeconds % 60).toString().padStart(2, '0')}`}
+          />
+
+          {/* BTC 分时图 */}
+          <Card title={t('cryptoTailMonitor.chart.btcTitle')}>
+            <div
+              ref={chartRef}
+              style={{
+                width: '100%',
+                height: isMobile ? 200 : 240
+              }}
+            />
+          </Card>
+
+          {/* 市场分时图 */}
+          <Card title={t('cryptoTailMonitor.chart.marketTitle')} style={{ marginTop: 16 }}>
+            <div
+              ref={marketChartRef}
+              style={{
+                width: '100%',
+                height: isMobile ? 200 : 240
+              }}
+            />
+          </Card>
+
+          {/* 策略信息 */}
+          <Card title={t('cryptoTailMonitor.strategyInfo.title')} style={{ marginTop: 16 }}>
+            <Row gutter={[16, 8]}>
+              <Col span={12}>
+                <Text type="secondary">{t('cryptoTailMonitor.strategyInfo.market')}: </Text>
+                <Text>{initData.marketTitle}</Text>
+              </Col>
+              <Col span={12}>
+                <Text type="secondary">{t('cryptoTailMonitor.strategyInfo.interval')}: </Text>
+                <Text>{initData.intervalSeconds === 300 ? '5m' : '15m'}</Text>
+              </Col>
+              <Col span={12}>
+                <Text type="secondary">{t('cryptoTailMonitor.strategyInfo.account')}: </Text>
+                <Text>{initData.accountName || `#${initData.accountId}`}</Text>
+              </Col>
+              <Col span={12}>
+                <Text type="secondary">{t('cryptoTailMonitor.strategyInfo.spreadMode')}: </Text>
+                <Text>{initData.minSpreadMode}</Text>
+                {initData.minSpreadMode === 'FIXED' && initData.minSpreadValue && (
+                  <Text> ({formatNumber(initData.minSpreadValue, 4)})</Text>
+                )}
+              </Col>
+            </Row>
+          </Card>
+        </>
+      )}
+    </div>
+  )
+}
+
+export default CryptoTailMonitor

frontend/src/services/api.ts

@@ -497,7 +497,9 @@ export const apiService = {
     marketOptions: () =>
       apiClient.post<ApiResponse<import('../types').CryptoTailMarketOptionDto[]>>('/crypto-tail-strategy/market-options', {}),
     autoMinSpread: (data: { intervalSeconds: number }) =>
-      apiClient.post<ApiResponse<import('../types').CryptoTailAutoMinSpreadResponse>>('/crypto-tail-strategy/auto-min-spread', data)
+      apiClient.post<ApiResponse<import('../types').CryptoTailAutoMinSpreadResponse>>('/crypto-tail-strategy/auto-min-spread', data),
+    monitorInit: (strategyId: number) =>
+      apiClient.post<ApiResponse<import('../types').CryptoTailMonitorInitResponse>>('/crypto-tail-strategy/monitor/init', { strategyId })
   },
   
   /**

frontend/src/types/index.ts

@@ -1107,3 +1107,97 @@ export interface CryptoTailMarketOptionDto {
   periodStartUnix: number
   endDate?: string
 }
+
+/**
+ * 尾盘策略监控初始化响应
+ */
+export interface CryptoTailMonitorInitResponse {
+  /** 策略ID */
+  strategyId: number
+  /** 策略名称 */
+  name: string
+  /** 账户ID */
+  accountId: number
+  /** 账户名称 */
+  accountName: string
+  /** 市场 slug 前缀 */
+  marketSlugPrefix: string
+  /** 市场标题 */
+  marketTitle: string
+  /** 周期秒数 (300=5m, 900=15m) */
+  intervalSeconds: number
+  /** 当前周期开始时间 (Unix 秒) */
+  periodStartUnix: number
+  /** 时间窗口开始秒数 */
+  windowStartSeconds: number
+  /** 时间窗口结束秒数 */
+  windowEndSeconds: number
+  /** 最低价格 */
+  minPrice: string
+  /** 最高价格 */
+  maxPrice: string
+  /** 最小价差模式: NONE, FIXED, AUTO */
+  minSpreadMode: string
+  /** 价差方向: MIN（显示周期内最小价差）, MAX（显示周期内最大价差） */
+  spreadDirection?: string
+  /** 最小价差数值 (FIXED 时有值) */
+  minSpreadValue?: string
+  /** 自动计算的最小价差 (Up方向) */
+  autoMinSpreadUp?: string
+  /** 自动计算的最小价差 (Down方向) */
+  autoMinSpreadDown?: string
+  /** BTC 开盘价 USDC（来自币安 K 线） */
+  openPriceBtc?: string
+  /** Up tokenId */
+  tokenIdUp?: string
+  /** Down tokenId */
+  tokenIdDown?: string
+  /** 当前时间 (毫秒时间戳) */
+  currentTimestamp: number
+  /** 是否启用 */
+  enabled: boolean
+}
+
+/**
+ * 尾盘策略监控实时推送数据
+ */
+export interface CryptoTailMonitorPushData {
+  /** 策略ID */
+  strategyId: number
+  /** 推送时间 (毫秒时间戳) */
+  timestamp: number
+  /** 当前周期开始时间 (Unix 秒) */
+  periodStartUnix: number
+  /** 当前价格 (Up方向，来自订单簿) */
+  currentPriceUp?: string
+  /** 当前价格 (Down方向，来自订单簿) */
+  currentPriceDown?: string
+  /** 当前价差 (Up方向: 1 - currentPriceUp) */
+  spreadUp?: string
+  /** 当前价差 (Down方向: currentPriceUp) */
+  spreadDown?: string
+  /** 最小价差线 (Up方向，USDC) */
+  minSpreadLineUp?: string
+  /** 最小价差线 (Down方向，USDC) */
+  minSpreadLineDown?: string
+  /** BTC 开盘价 USDC */
+  openPriceBtc?: string
+  /** BTC 最新价 USDC */
+  currentPriceBtc?: string
+  /** BTC 价差 USDC（currentPriceBtc - openPriceBtc） */
+  spreadBtc?: string
+  /** 周期剩余秒数 */
+  remainingSeconds: number
+  /** 是否在时间窗口内 */
+  inTimeWindow: boolean
+  /** 是否在价格区间内 (Up方向) */
+  inPriceRangeUp: boolean
+  /** 是否在价格区间内 (Down方向) */
+  inPriceRangeDown: boolean
+  /** 是否已触发 */
+  triggered: boolean
+  /** 触发方向: UP, DOWN, null */
+  triggerDirection?: string
+  /** 周期是否已结束 */
+  periodEnded: boolean
+}