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Here is a four simple steps to do what you want :

#include <stdlib.mqh>
// this will help with error description
/*
You need to copy/paste #include <stdlib.mqh> if not already done so
Then copy/paste the CloseThisSymbolAll function to the end of your EA
Change the name of the variable "MagicNumber " to the name you use in 
your EA for magic number
Then modify your line (copy/pste) to match the following :
*/
if ( (CloseAfterHourFriday != 0) && (DayOfWeek() == 5) && (Hour() >= CloseAfterHourFriday) && (AccountProfit()>= CloseProfitFriday) )
CloseThisSymbolAll();



//========================================================================

void CloseThisSymbolAll()
  {
   int trade;
   for(trade=OrdersTotal();trade>=0;trade--)
     {
      OrderSelect(trade,SELECT_BY_POS,MODE_TRADES);
     // if(OrderSymbol()!=Symbol()) continue;
     // if(OrderSymbol()==Symbol() && OrderMagicNumber()==MagicNumber)
        {
         if(OrderType()==OP_BUY)OrderClose(OrderTicket(),OrderLots(),Bid,slip,Blue);
         if(OrderType()==OP_SELL)OrderClose(OrderTicket(),OrderLots(),Ask,slip,Red);
         if(OrderType()==OP_BUYLIMIT)OrderDelete(OrderTicket(),Blue);
         if(OrderType()==OP_SELLLIMIT)OrderDelete(OrderTicket(),Blue);
         if(OrderType()==OP_BUYSTOP)OrderDelete(OrderTicket(),Blue);
         if(OrderType()==OP_SELLSTOP)OrderDelete(OrderTicket(),Blue);
         ErrorDescription(GetLastError());
        }
     }
  }
//========================================================================