Today both indices opened a 1% gap-up. But then both indices stayed Rangebound for the whole session.
The 17750-820 zone is a crucial resistance for the bulls. And over that zone, Nifty bulls can take some pause. On the lower side, 17600-580 will act as support.
Bank Nifty now needs to hold the 38600-300 zone for further upside. And on the higher side, 39100 & 39500 are the major resistances.

Nifty Intraday Gann levels
Nifty bulls need to break & sustain above 17680 to move towards 17720/17760/17820/17890.
On the lower side, the Gann support level is 17580; below that Index can move towards 17540/17490/17430/17360.
Bank Nifty Intraday Gann levels
Bank Nifty bulls need to break & sustain above 38950 to move towards 39100/39300/39550.
On the lower side, the Gann support level is 38600; below that Bank Nifty Index can move towards 38450/38250/38000.
Note: The above levels are for educational purposes. Not Buy/Sell advice.