Take alook at the entire code and add 1 function to limit number of orders

Hello, look at the entire code, check that it is programmed correctly, that there are no functions that are useless! Add a function so that there is only 1 order per currency pair. Currently it can happen that there are 2 or 3 orders per currency pair, I want to limit the number of orders to 1 per currency pair.

Add a code like this example :

int TotalOrders(string symbol="", ulong magic = -1) {

   int cnt = 0;

   int pos_total = PositionsTotal();

   for(int pos =pos_total-1;pos>=0;pos--)  {

      ulong pos_ticket = PositionGetTicket(pos);

      if(PositionSelectByTicket(pos_ticket) && (symbol=="" || PositionGetSymbol(POSITION_SYMBOL)==symbol) && ( magic==-1 || PositionGetInteger(POSITION_MAGIC)==magic) ) {

      cnt++;   

      }

   }

   return(cnt);

}

it's just an example of what I want, it can be programmed differently.