Nifty half hourly chart
The nifty has taken support at the 23.6% retracement level of the recent rise from 2539. The other fibonacci support levels are 2705-2673-2640.
My startegy would be to go long once the 2805-2840 levels are overcome decisively. Else, if the nifty rebounds from any of the support levels , then one can go long with appropritate stop loss, as the short term trend is up, and breakout from 2805-2840 can give good upsides of around 200 points.
Happy Trading !!