if (isBullish || isBearish)
        {
            string symbolName = _Symbol;
            if (!trade.OrderSend(symbolName, orderType, LotSize, orderPrice, 10, sl, tp, "", 0, 0, clrNONE))
            {
                Print("Error placing order: ", trade.ResultRetcode());
            }
            else
            {
                PrintFormat("Order placed successfully: %s %s at price %f, SL: %f, TP: %f, Volume: %f",
                            (isBullish ? "Buy" : "Sell"), (isBullish ? "Stop" : "Stop"), orderPrice, sl, tp, LotSize);
            }
        }
    }

I have an error ‘symbolName’ – parameter conversion not allowed
how can solve this?

I use chat gpt to coding my strategy and I have this problem only