//+------------------------------------------------------------------+
//|                                                      MyExpert.mq |
//|                        Copyright 2020-2024, MetaQuotes Ltd.      |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#include <Expert\Expert.mqh>
#include "Indicators.mqh"
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
class CMyExpert : public CExpert
  {
private:
public:
                     CMyExpert(void);
   virtual           ~CMyExpert(void);
   virtual bool      Processing(void) override;
   virtual bool      CheckCloseLong() override;
   virtual bool      CheckCloseShort() override;
   virtual bool      OpenLong(double price,double sl,double tp) override;
   virtual bool      OpenShort(double price,double sl,double tp) override;
  };

//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
CMyExpert::CMyExpert(void)
  {
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
CMyExpert::~CMyExpert(void)
  {
  }
//+------------------------------------------------------------------+
//| Custom processing method                                         |
//+------------------------------------------------------------------+
bool CMyExpert::Processing(void)
  {

   ExtractCurrentIndicators();
//--- calculate signal direction once
   m_signal.SetDirection();
//--- check if open positions
   if(SelectPosition())
     {
      //--- open position is available
      //--- check the possibility of reverse the position
      if(CheckReverse())
         return(true);
      //--- check the possibility of closing the position/delete pending orders
      if(!CheckClose())
        {
         //--- check the possibility of modifying the position
         if(CheckTrailingStop())
            return(true);
         //--- return without operations
         return(false);
        }
     }
//--- check if plased pending orders
   int total=OrdersTotal();
   if(total!=0)
     {
      for(int i=total-1; i>=0; i--)
        {
         m_order.SelectByIndex(i);
         if(m_order.Symbol()!=m_symbol.Name())
            continue;
         if(m_order.OrderType()==ORDER_TYPE_BUY_LIMIT || m_order.OrderType()==ORDER_TYPE_BUY_STOP)
           {
            //--- check the ability to delete a pending order to buy
            if(CheckDeleteOrderLong())
               return(true);
            //--- check the possibility of modifying a pending order to buy
            if(CheckTrailingOrderLong())
               return(true);
           }
         else
           {
            //--- check the ability to delete a pending order to sell
            if(CheckDeleteOrderShort())
               return(true);
            //--- check the possibility of modifying a pending order to sell
            if(CheckTrailingOrderShort())
               return(true);
           }
         //--- return without operations
         return(false);
        }
     }
//--- check the possibility of opening a position/setting pending order
   if(CheckOpen())
      return(true);
//--- return without operations
   return(false);
  }
//+------------------------------------------------------------------+

//+------------------------------------------------------------------+
//| 平多单                                                           |
//+------------------------------------------------------------------+
bool CMyExpert::CheckCloseLong(void)
  {
   return false;
  }

//+------------------------------------------------------------------+
//| 平空单                                                           |
//+------------------------------------------------------------------+
bool CMyExpert::CheckCloseShort(void)
  {
   return false;
  }
//+------------------------------------------------------------------+
//| Long position open or limit/stop order set                       |
//+------------------------------------------------------------------+
bool CMyExpert::OpenLong(double price,double sl,double tp)
  {
   if(price==EMPTY_VALUE)
      return(false);
//--- get lot for open
   double lot=LotOpenLong(price,sl);
//--- check lot for open
   lot=LotCheck(lot,price,ORDER_TYPE_BUY);
   if(lot==0.0)
      return(false);
//--- 在这里循环
   m_trade.Buy(lot,price,sl,tp);
   return(true);
  }
//+------------------------------------------------------------------+
//| Short position open or limit/stop order set                      |
//+------------------------------------------------------------------+
bool CMyExpert::OpenShort(double price,double sl,double tp)
  {
   if(price==EMPTY_VALUE)
      return(false);
//--- get lot for open
   double lot=LotOpenShort(price,sl);
//--- check lot for open
   lot=LotCheck(lot,price,ORDER_TYPE_SELL);
   if(lot==0.0)
      return(false);
//---
   m_trade.Sell(lot,price,sl,tp);
   return(true);
  }