On Monday if nifty crosses 3100 up side it will go 3250-3500 also but if it goes to red i.e., below 2973 a steep fall below 2500 is expected. A good chance for a trader on both sides. up side 150 points minimum and down side 400 + +.  As of now markets are expected to open in green for the next day then one can go short and put a stop loss 3100.