【MetaTrader编程入门教程】---指标文件构成

       Sleep(5000); 
       }
    }
  }
}
//判断是否买或卖或平仓
int buyorsell()   //在这个函数计算设置你的交易信号
  {
   double MacdCurrent, MacdPrevious, SignalCurrent;
   double SignalPrevious, MaCurrent, MaPrevious;
   MacdCurrent=iMACD(NULL,0,12,26,9,PRICE_CLOSE,MODE_MAIN,0);
   MacdPrevious=iMACD(NULL,0,12,26,9,PRICE_CLOSE,MODE_MAIN,1);
   SignalCurrent=iMACD(NULL,0,12,26,9,PRICE_CLOSE,MODE_SIGNAL,0);
   SignalPrevious=iMACD(NULL,0,12,26,9,PRICE_CLOSE,MODE_SIGNAL,1);
   MaCurrent=iMA(NULL,0,MATrendPeriod,0,MODE_EMA,PRICE_CLOSE,0);
   MaPrevious=iMA(NULL,0,MATrendPeriod,0,MODE_EMA,PRICE_CLOSE,1);
 if(MacdCurrent<0 && MacdCurrent>SignalCurrent && MacdPrevious      &&  MaCurrent>MaPrevious)
   return (1); // 买  Ma在上升，Macd在0线上，并且两线上交叉
 if(MacdCurrent>0 && MacdCurrentSignalPrevious
       && MaCurrent    return (-1);  // 卖
 return (0); //不交易
}
int nowbuyorsell = 0;
void CheckForOpen()
{
 if (Time[0] == lasttime ) return; //每时间周期检查一次
 lasttime = Time[0];
 nowbuyorsell = buyorsell(); //获取买卖信号
 
 if (nowbuyorsell == 1) //买　先结束已卖的
     CloseSell();
 if (nowbuyorsell == -1) //卖　先结束已买的
      CloseBuy();
  if (TimeDayOfWeek(CurTime()) == 1)
   {
    if (TimeHour(CurTime()) < 3 ) return; //周一早8点前不做
   }
  if (TimeDayOfWeek(CurTime()) == 5)
   {
     if (TimeHour(CurTime()) > 19 ) return; //周五晚11点后不做
    }
 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();