The option chain reveals that there is practically no appreciable put writing on any strike which means that Put writers are not confident of any support or any strike price as support. Highest Put writing is only of 3.49 Lakhs at 12050 and highest total OI (of 15.28 lakhs) is at 12000. So if at all we are looking for support, 12050 and 12000, both should be considered. On Call side we see impressive Call writing at strikes 12100, 12150 & 12200. Out of three, 12150 looks promising since it has 2nd highest total OI (17.91 Lakhs) and highest Call writing (14.93 lakhs). So that would be my resistance tomorrow. On , Nifty today made a strong red or candle with LH and LL just above lower limit of secondary channel that I have marked and just above 50 too. As for levels marked on 15 min chart, avoid fresh buying for now. If you are already long on Nifty one can book profit at R1 and start fresh selling at Selling area shown. However, do that if it happens in first half. In second half, nifty can go wild so avoid contra-trade.
All the best. Happy trading.