Today both indices opened more than 1% down. But soon, both indices recovered back, and by the end of the day, Bank Nifty closed with more than 1% gains, but Nifty closed in the red.
Tomorrow in Nifty, the 18080-18100 zone will play an important role. A sustainable move above that zone can take the index towards 18190/18300 levels. And on the lower side, the 17940-17920 area is the support.
Yesterday Bank Nifty closing above 40700 was crucial. Then, it gained more strength; today, it shows that effect, as it rose over 1400 points from the day low. Until Bank Nifty is above the 40900-700 zone, the bulls are in a strong position. And on the higher side, the 41550-650 zone will act as resistance.

Nifty Intraday Gann levels
Nifty bulls need to break & sustain above 18070 to move towards 18110/18160/18220/18290.
On the lower side, the Gann support level is 17970; below that Index can move towards 17930/17880/17820/17750.

Bank Nifty Intraday Gann levels
Bank Nifty bulls need to break & sustain above 41650 to move towards 41800/42000/42250.
On the lower side, the Gann support level is 41300; below that Bank Nifty Index can move towards 41150/40950/40700.
Note: The above levels are for educational purposes. Not Buy/Sell advice.