extern double TakeProfit = 50;//止损价格
extern double Lots = 0.1;//开仓0.1手
extern double TrailingStop = 30;
extern double MACDOpenLevel=3;//交易所点差
extern double MACDCloseLevel=2;
extern double MATrendPeriod=5;//ma 参数
extern double PircMin=100;//最小保证金比例
extern double UserID=681668;//用户制定ID号码

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
int start()
  {
   double MacdCurrent, MacdPrevious, SignalCurrent;
   double SignalPrevious, MaCurrent, MaPrevious;
   int cnt, ticket, total;
// initial data checks
// it is important to make sure that the expert works with a normal
// chart and the user did not make any mistakes setting external
// variables (Lots, StopLoss, TakeProfit,
// TrailingStop) in our case, we check TakeProfit
// on a chart of less than 100 bars
   if(Bars<100)
     {
      Print("bars less than 100");
      return(0); 
     }
   if(TakeProfit<10)
     {
      Print("TakeProfit less than 10");
      return(0);  // check TakeProfit
     }
// to simplify the coding and speed up access
// data are put into internal variables
   MacdCurrent=iMACD(NULL,0,5,34,5,PRICE_CLOSE,MODE_MAIN,0);//引用macd指标线当前值
   MacdPrevious=iMACD(NULL,0,5,34,5,PRICE_CLOSE,MODE_MAIN,1);//macd指标前一个值
   SignalCurrent=iMACD(NULL,0,5,34,5,PRICE_CLOSE,MODE_SIGNAL,0);//信号线当前值
   SignalPrevious=iMACD(NULL,0,5,34,5,PRICE_CLOSE,MODE_SIGNAL,1);//信号线前一个值
   MaCurrent=iMA(NULL,0,MATrendPeriod,0,MODE_EMA,PRICE_CLOSE,0);//ma指标的当前值
   MaPrevious=iMA(NULL,0,MATrendPeriod,0,MODE_EMA,PRICE_CLOSE,1);//ma指标的前一个值。

   total=OrdersTotal();//返回市场和挂单的总数
   if(total<1)
     {
      // no opened orders identified
      if(AccountFreeMargin()<PircMin)
        {
         Print("没有资金了 = ", AccountFreeMargin());
         return(0); 
        }
      // check for long position (BUY) possibility
      if(MacdCurrent<0 && MacdCurrent>SignalCurrent && MacdPrevious<SignalPrevious &&
         MathAbs(MacdCurrent)>(MACDOpenLevel*Point) && MaCurrent>MaPrevious)//金叉
        {
         ticket=OrderSend(Symbol(),OP_BUY,Lots,Ask,3,0,Ask+TakeProfit*Point,"macd智能交易",UserID,0,Green);
        
         if(ticket>0)
           {
            if(OrderSelect(ticket,SELECT_BY_TICKET,MODE_TRADES)) Print("BUY order opened : ",OrderOpenPrice());
           
           }
         else Print("错误的买操作 : ",GetLastError());
         return(0);
        }
       
      // check for short position (SELL) possibility
      if(MacdCurrent>0 && MacdCurrent<SignalCurrent && MacdPrevious>SignalPrevious &&
         MacdCurrent>(MACDOpenLevel*Point) && MaCurrent<MaPrevious)//死叉
        {
         ticket=OrderSend(Symbol(),OP_SELL,Lots,Bid,3,0,Bid-TakeProfit*Point,"macd sample",16384,0,Red);
         if(ticket>0)
           {
            if(OrderSelect(ticket,SELECT_BY_TICKET,MODE_TRADES)) Print("SELL order opened : ",OrderOpenPrice());
           }
         else Print("Error opening SELL order : ",GetLastError());
         return(0);
        }
      return(0);
     }
   // it is important to enter the market correctly,
   // but it is more important to exit it correctly...  
   for(cnt=0;cnt<total;cnt++)
     {
      OrderSelect(cnt, SELECT_BY_POS, MODE_TRADES);
      if(OrderType()<=OP_SELL &&   // check for opened position
         OrderSymbol()==Symbol())  // check for symbol
        {
         if(OrderType()==OP_BUY)   // long position is opened
           {
            // should it be closed?
            if(MacdCurrent>0 && MacdCurrent<SignalCurrent && MacdPrevious>SignalPrevious &&
               MacdCurrent>(MACDCloseLevel*Point))
                {
                 OrderClose(OrderTicket(),OrderLots(),Bid,3,Violet); // 平仓操作
                 return(0); // exit
                }
            // check for trailing stop
            if(TrailingStop>0)  //移动止损
              {                
               if(Bid-OrderOpenPrice()>Point*TrailingStop)
                 {
                  if(OrderStopLoss()<Bid-Point*TrailingStop)
                    {
                     OrderModify(OrderTicket(),OrderOpenPrice(),Bid-Point*TrailingStop,OrderTakeProfit(),0,Green);
                     //对于先前的开仓或挂单进行特性修改
                     return(0);
                    }
                 }
              }
           }
         else // go to short position
           {
            // should it be closed?
            if(MacdCurrent<0 && MacdCurrent>SignalCurrent &&
               MacdPrevious<SignalPrevious && MathAbs(MacdCurrent)>(MACDCloseLevel*Point))
              {
               OrderClose(OrderTicket(),OrderLots(),Ask,3,Violet); // close position
               return(0); // exit
              }
            // check for trailing stop
            if(TrailingStop>0) 
              {                
               if((OrderOpenPrice()-Ask)>(Point*TrailingStop))
                 {
                  if((OrderStopLoss()>(Ask+Point*TrailingStop)) || (OrderStopLoss()==0))
                    {
                     OrderModify(OrderTicket(),OrderOpenPrice(),Ask+Point*TrailingStop,OrderTakeProfit(),0,Red);
                     return(0);
                    }
                 }
              }
           }
        }
     }
   return(0);
  }
// the end.