@sahil0008 go with ATM..don't go with Deep itm or itm.. fluctuations bahut hota hai.. if you trade in banknifty start with 20 points sl.. and 10 points in nifty.. but the entry should be accurate..else your sl will be gone.
@sahil0008 don't try to capture full movement as a beginner.. just manage your stop loss and keep trailing your profit. Try to get 20-40 points in one lot..