How to close all orders in MT4

In order to close all open market orders that are opened in MT4, you need to write and then call a similar function to the one below:


void CloseBuyOrders(string symbol=NULL,int magicNumber=-1)
  {
   int total=OrdersTotal();
   for(int b=0; b<=total-1; b++)
     {
      if(OrderSelect(b,SELECT_BY_POS,MODE_TRADES))
        {
         if((OrderMagicNumber()==magicNumber || magicNumber==-1) && (OrderSymbol()==symbol || StringLen(symbol)==0) && OrderType()==OP_BUY)
           {
            ResetLastError();
            color arrowColor=clrSteelBlue;
            if(!_ShowArrows) arrowColor=clrNONE;
            if(!OrderClose(OrderTicket(),OrderLots(),MarketInfo(OrderSymbol(),MODE_BID),10,arrowColor))
              {
               Print("Failed to close order in "+__FUNCTION__+", error="+(string)GetLastError());
               return;
              }
            else
              {
               total=OrdersTotal();
               b--;
              }
           }
        }
     }
  }

As you can clearly see in the name of this MQL4 function, this is supposed to close the BUY positions only. A function/method for SELL orders would be quite the same, except for one difference - can you guess what that is? Post in the comments below if you know what needs to be changed in the "CloseSellOrders" function.

In the next post I'll probably do a generic function for closing both BUY and SELL orders, or only the type that was sent as a parameter. Thanks for learning MT4 with me!