@dhirajsinha TBH I don't know the formula. But based on correlation of stock with nifty an indicative delta can be arrived. I heard on tastytrade they have it. Can be very useful to know what can happen to your portfolio with index movements.
@raahi_bhushan Keep hedges only for sustained nifty level. You will get them in monthlies or quarterlies. In our market near term hedges are very expensive.