Trade Closure Alert

 
Hello! Can anyone help me have this code that works perfectly in mt4. It alerts you when a trade is closed.
The code is very simple.
I would like to transcribe this code to MT5. I've tried here but I'm a layman on the subject!
#property indicator_chart_window
int Orders;
//+------------------------------------------------------------------+
int start()
  {
   if (Orders>OrdersTotal()) AlertOrder();
   Orders=OrdersTotal();
   return(0);
  }
//+------------------------------------------------------------------+
void AlertOrder()
{
   string txt;
   double OCP;
   int i=OrdersHistoryTotal()-1;
   if(OrderSelect(i,SELECT_BY_POS,MODE_HISTORY)==true)
   {                                     
      OCP=OrderClosePrice();
      if (OCP==OrderStopLoss()  ) txt="SL";
      if (OCP==OrderTakeProfit()) txt="TP";
      Alert("Order N ",OrderTicket()," close in ",txt," ",
      DoubleToStr(OCP,Digits)," profit ",DoubleToStr(OrderProfit(),2));
}  }
//+------------------------------------------------------------------+