MetaTrader编程入门教程

 if (OrdersTotal( ) >= maxOpen)  return ;  
//如果已持有开仓数达到最大，不做
 if (nowbuyorsell==0) return;   //不交易
 TradeOK();   //去下单交易
}
void TradeOK()   //去下单交易
{
int error ;
if (nowbuyorsell == 1) //买
   {
      switch (whichmethod)
      {
      case 1:   res=OrderSend(Symbol(),OP_BUY,LotsOptimized(),Ask,3,0,0,"",MAGICMA,0,Blue);break;
      case 2:   res=OrderSend(Symbol(),OP_BUY,LotsOptimized(),Ask,3,Ask-StopLoss*Point,0,"",MAGICMA,0,Blue); break;
      case 3:   res=OrderSend(Symbol(),OP_BUY,LotsOptimized(),Ask,3,0,Ask+TakeProfit*Point,"",MAGICMA,0,Blue);break;
      case 4:   res=OrderSend(Symbol(),OP_BUY,LotsOptimized(),Ask,3,Ask-StopLoss*Point,Ask+TakeProfit*Point,"",MAGICMA,0,Blue);break;
      default :  res=OrderSend(Symbol(),OP_BUY,LotsOptimized(),Ask,3,0,0,"",MAGICMA,0,Blue);break;
      }
      if (res <=0)
      {
       error=GetLastError();
      if(error==134)Print("Received 134 Error after OrderSend() !! ");             // not enough money
      if(error==135) RefreshRates();   // prices have changed
      }
      Sleep(5000);
      return ;   
   }
if (nowbuyorsell == -1) //卖
    {
      switch (whichmethod)
      {
      case 1:   res=OrderSend(Symbol(),OP_SELL,LotsOptimized(),Bid,3,0,0,"",MAGICMA,0,Red); break;
      case 2:   res=OrderSend(Symbol(),OP_SELL,LotsOptimized(),Bid,3,Bid+StopLoss*Point,0,"",MAGICMA,0,Red);  break;
      case 3:   res=OrderSend(Symbol(),OP_SELL,LotsOptimized(),Bid,3,0,Bid-TakeProfit*Point,"",MAGICMA,0,Red); break;
      case 4:   res=OrderSend(Symbol(),OP_SELL,LotsOptimized(),Bid,3,Bid+StopLoss*Point,Bid-TakeProfit*Point,"",MAGICMA,0,Red);  break;
      default : res=OrderSend(Symbol(),OP_SELL,LotsOptimized(),Bid,3,0,0,"",MAGICMA,0,Red); break;
      }
      if (res <=0)
      {
      error=GetLastError();
      if(error==134) Print("Received 134 Error after OrderSend() !! ");            // not enough money
      if(error==135) RefreshRates();   // prices have changed
      }
      Sleep(5000);
       return ;   
    }
}

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