Nifty today most of the time stayed range bound only after 2 PM gave good move to downside.
For tuesday levels to trade
Supprot 21730 Below sustains Short Targets of 21700,21660,21630,21600.
Resistance 21850 Above sustains Long Targets of 21900,21925,21960,22000.
Metioned targets can act as reversals also please check price action on those levels.