I’m not very familiar with mt4.
I want to close any sell position that is available, and if it is not available open a new buy position every time that function is executed. any solution or idea. I would greatly appreciate it. I am trying doing by this code but not working.order not closing.

///////

bool deleteLastSell()
{
  bool success = true;
  int lastSellOrder = -1;
  for (int i = OrdersTotal() - 1; i >= 0; --i) 
  {  
    if (OrderSelect(i, SELECT_BY_POS))
    {
      if (OrderType() == OP_SELL)
      {
        lastSellOrder = i;
        break;
      }
    }
  }
  if (lastSellOrder != -1)
  {
    if (!OrderClose(OrderSelect(lastSellOrder, SELECT_BY_POS), OrderLots(), Bid, Slippage))
    {
      Alert("Order #", OrderTicket(), " was not closed");
      success = false;
    }
  }
  else
  {
    Alert("No sell orders to delete");
  }
  return success;
}


//////////