Cerrar Todas Las Órdenes

//https://www.youtube.com/watch?v=ZQlKJdGoQjY

#include<Trade\Trade.mqh>
CTrade trade;

void OnStart()
  {

  int a=OrdersTotal();

   while(a!=0)
   {
        ulong Ticket=OrderGetTicket(OrdersTotal()-1);
        trade.OrderDelete(Ticket);
        a--;
   }
}