Overnight/positional or intraday trade futures using NRML with margins mentioned below. Once a position taken as NRML, it can be held till the expiry provided the requesite NRML margin present in the trading account.
Margin Intraday Square off
Intraday trade using MIS for additional leverage (50% of NRML margin) between 9:00 AM and 4:30 PM. All open MIS positions get squared off at 4:30 PM.