I use this on MT4 and put this script on FN2 with ctrl+J keys and it works very well.

//+------------------------------------------------------------------+
//| CloseAllTradesPendingCurrent.mq4 |
//| Leandro Aloisio |
//| Brazil |
//+------------------------------------------------------------------+

//+------------------------------------------------------------------+
//| script program start function |
//+------------------------------------------------------------------+

// script closes all pending positions on current chart
int start()
{
double total;
while(OpenTradesForSymbol()>0)
{
//close opened orders first
total = OrdersTotal();
for (int cnt = total-1; cnt >=0 ; cnt--)
{
if(OrderSelect(cnt,SELECT_BY_POS,MODE_TRADES))
{
if(OrderSymbol()==Symbol())
{
switch(OrderType())
{
case OP_BUYLIMIT 😮rderDelete(OrderTicket()); break;
case OP_SELLLIMIT 😮rderDelete(OrderTicket()); break;
case OP_BUYSTOP 😮rderDelete(OrderTicket()); break;
case OP_SELLSTOP 😮rderDelete(OrderTicket()); break;
}
}
}
}
}
return(0);
}

int OpenTradesForSymbol()
{
int icnt, itotal, retval;

retval=0;
itotal=OrdersTotal();

  for(icnt=itotal-1;icnt>=0;icnt--) 
  {
     OrderSelect(icnt, SELECT_BY_POS, MODE_TRADES);
     if (OrderSymbol()== Symbol())
     {
        if(OrderType()==OP_BUYLIMIT || OrderType()==OP_SELLLIMIT || OrderType()==OP_BUYSTOP || OrderType()==OP_SELLSTOP)
         retval++;             
     } 
  }

return(retval);
}
//+------------------------------------------------------------------+

www.magickeys.trade

Follow us on Instagram @magickeys.trade