If i am doing a day trading in Futures(index or stocks) do i need to select the product code as MIS or NRML?

product type MIS- for day trading

NRML- for overnight position

if i choose Nrml and then close the trade the same day, would the brokerage and stt be for intraday or nrml?

buy and sell on the same day is considered as intraday. the only difference is by using MIS u get more leverage and your position will be auto squared off by eod. with NRML u dont get any leverage and can carry the contract till the expiry