148 lines
4.9 KiB
Plaintext
148 lines
4.9 KiB
Plaintext
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//+------------------------------------------------------------------+
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//| Trend.mqh – Step 1: Trend detection via EMA34 & EMA89 |
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//| |
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//| Logic: |
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//| BULLISH: EMA_fast > EMA_slow AND close > EMA_fast |
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//| BEARISH: EMA_fast < EMA_slow AND close < EMA_fast |
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//| NEUTRAL: otherwise (EMA crossing or price between EMAs) |
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//+------------------------------------------------------------------+
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#ifndef __SIMPLE_FVG_TREND_MQH__
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#define __SIMPLE_FVG_TREND_MQH__
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#include "Config.mqh"
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//+------------------------------------------------------------------+
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//| Module state |
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//+------------------------------------------------------------------+
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int g_HandleEMAFast = INVALID_HANDLE;
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int g_HandleEMASlow = INVALID_HANDLE;
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string g_NameEMAFast = "";
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string g_NameEMASlow = "";
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double g_EMAFastValue = 0.0;
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double g_EMASlowValue = 0.0;
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ENUM_TREND_DIRECTION g_CurrentTrend = TREND_NEUTRAL;
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//+------------------------------------------------------------------+
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//| Init: create EMA indicator handles and add to chart |
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//+------------------------------------------------------------------+
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bool TrendInit()
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{
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string symbol = GetTradeSymbol();
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g_HandleEMAFast = iMA(symbol, InpTimeframe, InpEMAFastPeriod, 0, MODE_EMA, PRICE_CLOSE);
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if(g_HandleEMAFast == INVALID_HANDLE)
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{
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PrintFormat("[Trend] FAILED to create EMA%d handle", InpEMAFastPeriod);
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return false;
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}
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g_HandleEMASlow = iMA(symbol, InpTimeframe, InpEMASlowPeriod, 0, MODE_EMA, PRICE_CLOSE);
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if(g_HandleEMASlow == INVALID_HANDLE)
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{
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PrintFormat("[Trend] FAILED to create EMA%d handle", InpEMASlowPeriod);
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return false;
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}
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ChartIndicatorAdd(0, 0, g_HandleEMAFast);
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int countAfterFast = ChartIndicatorsTotal(0, 0);
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if(countAfterFast > 0)
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g_NameEMAFast = ChartIndicatorName(0, 0, countAfterFast - 1);
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ChartIndicatorAdd(0, 0, g_HandleEMASlow);
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int countAfterSlow = ChartIndicatorsTotal(0, 0);
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if(countAfterSlow > 0)
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g_NameEMASlow = ChartIndicatorName(0, 0, countAfterSlow - 1);
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if(InpDebugLog)
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PrintFormat("[Trend] OK – EMA%d + EMA%d on %s %s",
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InpEMAFastPeriod, InpEMASlowPeriod,
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symbol, EnumToString(InpTimeframe));
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return true;
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}
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//+------------------------------------------------------------------+
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//| Deinit: release handles and remove from chart |
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//+------------------------------------------------------------------+
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void TrendDeinit()
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{
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if(g_NameEMAFast != "")
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ChartIndicatorDelete(0, 0, g_NameEMAFast);
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if(g_NameEMASlow != "")
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ChartIndicatorDelete(0, 0, g_NameEMASlow);
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if(g_HandleEMAFast != INVALID_HANDLE)
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{
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IndicatorRelease(g_HandleEMAFast);
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g_HandleEMAFast = INVALID_HANDLE;
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}
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if(g_HandleEMASlow != INVALID_HANDLE)
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{
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IndicatorRelease(g_HandleEMASlow);
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g_HandleEMASlow = INVALID_HANDLE;
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}
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}
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//+------------------------------------------------------------------+
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//| Read one EMA value at a given bar shift |
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//+------------------------------------------------------------------+
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double ReadEMA(int handle, int shift)
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{
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double buffer[1];
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if(handle == INVALID_HANDLE) return 0.0;
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if(CopyBuffer(handle, 0, shift, 1, buffer) < 1) return 0.0;
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return buffer[0];
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}
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//+------------------------------------------------------------------+
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//| Update trend direction (call once per new bar) |
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//+------------------------------------------------------------------+
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ENUM_TREND_DIRECTION TrendUpdate()
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{
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g_EMAFastValue = ReadEMA(g_HandleEMAFast, 1);
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g_EMASlowValue = ReadEMA(g_HandleEMASlow, 1);
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if(g_EMAFastValue == 0.0 || g_EMASlowValue == 0.0)
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{
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g_CurrentTrend = TREND_NEUTRAL;
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return g_CurrentTrend;
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}
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double closePrice = iClose(GetTradeSymbol(), InpTimeframe, 1);
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if(g_EMAFastValue > g_EMASlowValue && closePrice > g_EMAFastValue)
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g_CurrentTrend = TREND_BULLISH;
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else if(g_EMAFastValue < g_EMASlowValue && closePrice < g_EMAFastValue)
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g_CurrentTrend = TREND_BEARISH;
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else
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g_CurrentTrend = TREND_NEUTRAL;
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return g_CurrentTrend;
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}
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//+------------------------------------------------------------------+
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//| Utility: convert trend enum to readable string |
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//+------------------------------------------------------------------+
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string TrendToString(ENUM_TREND_DIRECTION trend)
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{
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switch(trend)
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{
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case TREND_BULLISH: return "BULLISH";
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case TREND_BEARISH: return "BEARISH";
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default: return "NEUTRAL";
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}
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}
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color TrendToColor(ENUM_TREND_DIRECTION trend)
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{
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switch(trend)
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{
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case TREND_BULLISH: return clrLime;
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case TREND_BEARISH: return clrTomato;
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default: return clrGray;
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}
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}
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#endif
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