Supports MT5 and forex trading.

Signed-off-by: TIANHE <TIANHE@GMAIL.COM>

backend_api_python/app/services/live_trading/execution.py

@@ -4,6 +4,7 @@ Translate a strategy signal into a direct-exchange order call.
 Supports:
 - Crypto exchanges: Binance, OKX, Bitget, Bybit, Coinbase, Kraken, KuCoin, Gate, Bitfinex
 - Traditional brokers: Interactive Brokers (IBKR) for US/HK stocks
+- Forex brokers: MetaTrader 5 (MT5)
 """
 
 from __future__ import annotations
@@ -28,6 +29,9 @@ from app.services.live_trading.bitfinex import BitfinexClient, BitfinexDerivativ
 # Lazy import IBKR
 IBKRClient = None
 
+# Lazy import MT5
+MT5Client = None
+
 
 def _signal_to_sides(signal_type: str) -> Tuple[str, str, bool]:
     """
@@ -169,6 +173,24 @@ def place_order_from_signal(
             exchange_config=exchange_config,
         )
 
+    # Check for MT5 client (lazy import to avoid circular dependency)
+    global MT5Client
+    if MT5Client is None:
+        try:
+            from app.services.mt5_trading import MT5Client as _MT5Client
+            MT5Client = _MT5Client
+        except ImportError:
+            pass
+
+    if MT5Client is not None and isinstance(client, MT5Client):
+        return _place_mt5_order(
+            client=client,
+            signal_type=signal_type,
+            symbol=symbol,
+            amount=qty,
+            exchange_config=exchange_config,
+        )
+
     raise LiveTradingError(f"Unsupported client type: {type(client)}")
 
 
@@ -228,3 +250,56 @@ def _place_ibkr_order(
     )
 
 
+def _place_mt5_order(
+    client,
+    *,
+    signal_type: str,
+    symbol: str,
+    amount: float,
+    exchange_config: Optional[Dict[str, Any]] = None,
+) -> LiveOrderResult:
+    """
+    Place order via MT5 for forex trading.
+
+    Signal mapping for forex:
+    - open_long / add_long -> BUY
+    - close_long / reduce_long -> SELL
+    - open_short / add_short -> SELL
+    - close_short / reduce_short -> BUY
+    """
+    sig = (signal_type or "").strip().lower()
+
+    # Determine action based on signal
+    if sig in ("open_long", "add_long"):
+        action = "buy"
+    elif sig in ("close_long", "reduce_long"):
+        action = "sell"
+    elif sig in ("open_short", "add_short"):
+        action = "sell"
+    elif sig in ("close_short", "reduce_short"):
+        action = "buy"
+    else:
+        raise LiveTradingError(f"Unsupported signal_type for MT5: {signal_type}")
+
+    # Place market order
+    result = client.place_market_order(
+        symbol=symbol,
+        side=action,
+        volume=amount,
+        comment="QuantDinger",
+    )
+
+    # Convert MT5Client result to LiveOrderResult format
+    return LiveOrderResult(
+        success=result.success,
+        exchange_order_id=str(result.order_id) if result.order_id else "",
+        filled=result.filled,
+        avg_price=result.price,
+        raw={
+            "status": result.status,
+            "message": result.message,
+            "deal_id": result.deal_id,
+            "raw": result.raw,
+        },
+    )
+