//+------------------------------------------------------------------+
//|                                                   ADX_System.mq4 |
//|                                                           System |
//|                                                   work_a@ukr.net |
//+------------------------------------------------------------------+
#property copyright "System"
#property link      "work_a@ukr.net"
extern double TakeProfit = 100;
extern double Lots =1;
extern double TrailingStop = 0;
extern double StopLoss = 30;
int start()
 {
  double ADXP,ADXC,ADXDIPP;
   double ADXDIPC,ADXDIMP,ADXDIMC;
   int cnt, ticket, total;
   if(Bars<100)
     {
      Print("bars less than 100");
      return(0);  
     }
   if(TakeProfit<10)
     {
      Print("TakeProfit less than 10");
      return(0);  // check TakeProfit
     }
   ADXP=iADX(NULL,0,14,PRICE_CLOSE,MODE_MAIN,2);
   ADXC=iADX(NULL,0,14,PRICE_CLOSE,MODE_MAIN,1);
   ADXDIPP=iADX(NULL,0,14,PRICE_CLOSE,MODE_PLUSDI,2);
   ADXDIPC=iADX(NULL,0,14,PRICE_CLOSE,MODE_PLUSDI,1);  
   ADXDIMP=iADX(NULL,0,14,PRICE_CLOSE,MODE_MINUSDI,2);
   ADXDIMC=iADX(NULL,0,14,PRICE_CLOSE,MODE_MINUSDI,1);  
     total=OrdersTotal();
   if(total<1) 
     {
      // no opened orders identified
      if(AccountFreeMargin()<(1000*Lots))
        {
         Print("We have no money. Free Margin = ", AccountFreeMargin());
         return(0);  
        }
      // check for long position (BUY) possibility
      if((ADXP<ADXC)&&(ADXDIPP<ADXP)&&(ADXDIPC>ADXC))
        {
         ticket=OrderSend(Symbol(),OP_BUY,Lots,Ask,3,Bid-StopLoss*Point,Ask+TakeProfit*Point,"adx sample",16384,0,Green);
         if(ticket>0)
           {
            if(OrderSelect(ticket,SELECT_BY_TICKET,MODE_TRADES)) Print("BUY order opened : ",OrderOpenPrice());
           }
         else Print("Error opening BUY order : ",GetLastError()); 
         return(0); 
        }
      // check for short position (SELL) possibility
      if((ADXP<ADXC)&&(ADXDIMP<ADXP)&&(ADXDIMC>ADXC))
        {
         ticket=OrderSend(Symbol(),OP_SELL,Lots,Bid,3,Ask+StopLoss*Point,Bid-TakeProfit*Point,"adx 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);
     }
  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
           {
                 if(ADXP>ADXC && ADXDIPP>ADXP && ADXDIPC<ADXC)
                {
                 OrderClose(OrderTicket(),OrderLots(),Bid,3,Violet); // close position
                 return(0); // exit
                }
            if(TrailingStop>0)  
              {                 
               if(Bid-OrderOpenPrice()>Point*TrailingStop)
                 {
                  if(OrderStopLoss()<Bid-Point*TrailingStop)
                    {
                     OrderModify(OrderTicket(),OrderOpenPrice(),Bid-Point*TrailingStop,OrderTakeProfit(),0,Green);
                     return(0);
                    }
                 }
              }
           }
         else 
           {
             if(ADXP>ADXC && ADXDIMP>ADXP && ADXDIMC<ADXC)
             {
               OrderClose(OrderTicket(),OrderLots(),Ask,3,Violet); // close position
               return(0); // exit
              }
             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);
  }