//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit() {
   return(INIT_SUCCEEDED);
}
//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason) {
}
//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick() {
   // Example: Close all open SELL positions with Magic Number 12345
   CloseBuyOrSell(ORDER_TYPE_SELL, 0);
}
//+------------------------------------------------------------------+
//| Function to close BUY or SELL positions based on type and magic |
//+------------------------------------------------------------------+
void CloseBuyOrSell(ENUM_ORDER_TYPE Type, int magicPO = 0) {
   // Loop through all open positions in reverse order
   for (int i = PositionsTotal() - 1; i >= 0; i--) {
      ulong ticket = PositionGetTicket(i); // Get the ticket of the position
      if (ticket == 0) continue; // Skip invalid tickets

      string symbol = PositionGetString(POSITION_SYMBOL); // Get the symbol of the position
      ulong magic = PositionGetInteger(POSITION_MAGIC); // Get the magic number of the position
      ENUM_ORDER_TYPE positionType = (ENUM_ORDER_TYPE)PositionGetInteger(POSITION_TYPE); // Get the type of the position

      // Check if the position matches the current symbol and magic number
      if (symbol != _Symbol || magic != magicPO) continue;

      // Check if the position type matches the requested type
      if (positionType == Type) {
         // Attempt to close the position
         if (Trade.PositionClose(ticket)) {
            Print("Position closed successfully: Ticket #", ticket);
         } else {
            Print("Failed to close position: Ticket #", ticket, " Error: ", GetLastError());
         }
      }
   }
}