So as you 15725 is a strong resistance level. . Nifty once it touch and then goes reverse, . So for tomorrow if Nifty break the resistance of 15725, then you should buy CE for the level of 15780. . If Nifty goes down below 15620, then you should go for PE. . No trading zone is 15630-15720. . In gap or gap down cases, wait for the correction and then buy the trade.