@tradeanalyzer_tradea, Yes. It’s possible to trade intraday in banknifty weekly options. However, NRIs have to come through a custodian via the CP (Custodial Participant) code.
No, currently we do not have a separate brokerage calculator for NRIs. The brokerage for F&O is flat Rs. 100 per order.
This depends on the custodian. You’ll have to check with them regarding how they’d give you collateral margins. In case you hold a demat account with us, we wouldn’t provide you any collateral on those securities/liquid funds for F&O trading for NRIs since the settlements happen through a custodian.
In case you have any further queries, do reach out to nridesk[at]zerodha[dot]com