OrderSend parameters change?

Hello, i am asking for help of all you code gurus and alike .
I have an EA that has OrderSend command with parameters set for comment:

OrderSend(Symbol(),OP_SELL,mylotsi,SellPrice,slippage,sl,tp,"triangle"+MagicNumber,MagicNumber,0,ArrowsColor);

On orders, this manifests like each order having a comment triangle100208, 100208 being my personal set magicnumber. Now, I would like to modify OrderSend line syntax, to clear comment completely from orders. Do I just delete red stuff and leave commas, like this?

OrderSend(Symbol(),OP_SELL,mylotsi,SellPrice,slippage,sl,tp,,,0,ArrowsColor);

Or what do I have to do to clear comment?

Thnx in advance.

OrderSend(Symbol(), OP_SELL, mylotsi, Bid, Slippage, sl, tp, NULL, NULL, ArrowsColor);

The reason you need Bid, is because you are selecting a market order, unless your variable SellPrice is set to the Bid, then it will work fine. But if your Sellprice variable is anyother price, the OrderSend will not be executed. If you were selecting a limit or stop order, you could use your SellPrice variable. Those would be OP_SELLLIMIT or OP_SELLSTOP instead of OP_SELL. Also note the NULL where you had the comment field before.

FYI if you just place your curser over any program code you want to find out more info about, then press F1, it will bring up the help for that bit of programming in the box at the bottom and it will explain how to fill out the parameters. Example OrderSend( .....) Jusr place the curser on the word OrderSend and then press F1. This works for every built in command and function of MT4

To clear the comment use:
OrderSend(Symbol(),OP_SELL,mylotsi, SellPrice,slippage,sl,tp,NULL,MagicNumber,0,ArrowsColor);

Thank you very very much, much learned and much obliged.