int PositionLastOpenedTicket(string f_symbol="", // instrument finansowy
                             int    f_cmd=-1,    // typ pozycji
                             int    f_magic=-1)  // identyfikator
  {
   if(f_cmd==OP_BUYLIMIT || f_cmd==OP_SELLLIMIT ||
      f_cmd==OP_BUYSTOP  || f_cmd==OP_SELLSTOP)
      return -1;
//---
   datetime f_timeOpen=0;
   int      f_ticket=-1;
   for(int i=OrdersTotal()-1; i>=0; i--)
      if(OrderSelect(i,SELECT_BY_POS,MODE_TRADES))
         if((f_symbol==OrderSymbol()      || f_symbol=="") &&
            (f_cmd   ==OrderType()        || f_cmd==-1)    &&
            (f_magic ==OrderMagicNumber() || f_magic==-1))
            if(OrderOpenTime()>f_timeOpen)
              {
               f_timeOpen=OrderOpenTime();
               f_ticket=OrderTicket();
              }
   return f_ticket;
  }