Banknifty (CMP 33856) is near to a support zone now. If has a crucial support at 33595 - 33137. It will try bounce from here as we have strong 2 support trend lines also at that point.
But if it breaks 33137 on closing basis then we might see a further fall towards 32506 after which next strong support level at 31000.
So for bank nifty to go up it should sustain 33595 - 33137 zone. Upside resistance we have around 34700 zone, manage your trades accordingly