The main issue in day trading is the lower the time frame more the whipsaw will be in sideways period.
If you can adapt accordingly day trading pays you well, my aim is to trade thats it day or swing any short term trading is okay for me, but a mix of swing and day trading has helped me stay in the game much longer than I has expected.
Currently I reduced my swing trading to concentrate more on day trading as swing trading I trade on 30 min charts and day trading 5 min charts, poor minds like mine are not suitable for watching multiple scrips in multiple timeframes. So I do day trading only in BNF and swing trading in DLF, Relcapital, Tatasteel and LT.
Before I used to swing trade in BNF and day trade simultaneously but since this can only be done by pros I stopped doing that
as swing bias was affecting day trading decisions