In today session nifty will open gap up near 17100 level. After opening important levels to watch are 17160 and 17070. If nifty starts trading above 17160 level then expected upside rally upto 17340+ level. Further downside possible if nifty not sustain above level and starts trading below 17070. Downside upto 16920 level expected in NIFTY below 17070.