Entered Nifty futures around 7472 and exited too early at 11:29 and put a "square off at market place order" and zerodha closed the positions at lowest point at 7506 and next 2 minutes it went to 7513 top. Lesson learned - always do a limit order for buy and sell. Happy that I made 34 pips profit today. but still recovering from 28k NIfty loss on Jan 27th.