I would be thinking about going much lower than 2% if you are day trading, more like 0.25%. If you go on a bad run and lose 5 trades in a row how will you feel being 10% down? That can be a serious blow mentally and hard to keep a cool head.
Day trading isn’t like position trading where you might only place a few trades over a whole year so you’ve got to lower that threshold. Just my opinion of course.
John J