Select MIS(Margin Order) or NRML(Normal Margin Order) if you want to trade intraday. You can click on Buy/sell button and select MIS as product in the order form to place the order. You should have adequate limits under margin segment before placing an intraday order. Intraday orders will square off by RMS team around 3:10 to 3:15 window defined by the broker. You can square off your position any time in market hours before RMS team square off your position.