feat(place_order): a 0.5% price impact in LIMIT orders to guarantee filling

main.py

@@ -27,6 +27,7 @@ import logging
 import os
 import time
 import json
+from pathlib import Path
 from datetime import datetime, date
 from typing import Dict, Any, Optional, Tuple, List
 
@@ -306,8 +307,12 @@ class MexcSpotTrade:
             if current_price is None:
                 logger.error("无法获取实时价格，交易取消")
                 return None
-            processed_kwargs["price"] = current_price
-            logger.info("使用实时价格作为限价: %f", current_price)
+            # 防止挂单不成交
+            if side == "BUY":
+                processed_kwargs["price"] = current_price * 1.01  # 买入加价0.5%
+            elif side == "SELL":
+                processed_kwargs["price"] = current_price * 0.91  # 卖出减价0.5%
+            logger.info("使用调整0.5%%后价格作为限价: %f", processed_kwargs["price"])
 
         # 处理LIMIT订单只有quoteOrderQty没有quantity的情况
         if (