持仓单一键平仓脚本 - MetaTrader 5脚本

在手动或自动化交易中，一键平仓功能都是比较常用的，特别是在涉及风控管理的时候，能够快速止损，有效控制风险。这个脚本功能实现起来并不难，但在程序化实现的过程中，会有一些不同的应用场景。

//+------------------------------------------------------------------+
//|                                                   |
//|                                         |
//|                                        http://www.popoding.club/ |
//+------------------------------------------------------------------+
#property copyright "Wen Tao Xiong"
#property link      "https://www.mql5.com/zh/users/xiongsir/seller"
#property version   "1.00"
//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
  {
//---
   for(int i = 0 ; i < PositionsTotal(); i++)
     {

      ulong pos_ticket = PositionGetTicket(i);  
      ulong pos_magic = PositionGetInteger(POSITION_MAGIC);
      string pos_symbol = PositionGetString(POSITION_SYMBOL);
      double pos_volume = PositionGetDouble(POSITION_VOLUME);  
      double pos_profit = PositionGetDouble(POSITION_PROFIT);  
      ENUM_POSITION_TYPE pos_type = (ENUM_POSITION_TYPE)PositionGetInteger(POSITION_TYPE);

      if(pos_magic == 0 && pos_symbol == "EURUSD" && pos_profit < 0)
        {

         MqlTradeRequest requst = {};
         MqlTradeResult result = {};

         double ask = SymbolInfoDouble(Symbol(),SYMBOL_ASK);
         double bid = SymbolInfoDouble(Symbol(),SYMBOL_BID);

         requst.action = TRADE_ACTION_DEAL;
         requst.position = pos_ticket;
         requst.symbol = pos_symbol;
         requst.volume = pos_volume;
         requst.deviation = 50;
         requst.magic = pos_magic;

         int filling_mode = (int)SymbolInfoInteger(Symbol(),SYMBOL_FILLING_MODE);
         if(filling_mode == 1)
           {
            requst.type_filling = ORDER_FILLING_FOK;
           }
         else
            if(filling_mode == 2)
              {
               requst.type_filling = ORDER_FILLING_IOC;
              }
            else
               if(filling_mode == 3)
                 {
                  requst.type_filling = ORDER_FILLING_RETURN;
                 }

         if(pos_type == POSITION_TYPE_BUY)
           {
            requst.type = ORDER_TYPE_SELL;
            requst.price = bid;
           }
         else
            if(pos_type == POSITION_TYPE_SELL)
              {
               requst.type = ORDER_TYPE_BUY;
               requst.price = ask;
              }

         if(!OrderSend(requst,result))
           {
            printf("OrderSend Error %d",GetLastError());
           }

        }

     }

  }
//+------------------------------------------------------------------+