seems like nifty has started wave 4 on minor degree in the on going impulse.one should avoid buying at current levels unless we see a decisive close above 18100 and wait till 17100 level is reached on index as it is the 38.2% retracement of previous wave 3 along with price action support zone.
Important rasistance level are 17684-17763-17842. Shortselling can be done once we get a hourly candle closing below previous candle's low around any of the rasistance level mentioned above.Here ideal stop would be 18100 and target would be 17100.
Manage position size as per your risk apetite.
Disclaimer:This are just my view on the index,no position should be taken solely on its basis.