Today will be gap down opening in BANKNIFTY. After opening if banknifty start trading below 47950 level then possible downside rally of 400-500 points upto 47550 Level in todays session.Any Major upside only expected in case banknifty starts trading above 48050 level to 48450 level & this rally can extend another 400 points if market gives breakout 48550 level.