Today will slightly gap up opening in banknifty. For today's session important support level for banknifty is 37000. In case banknifty break this support and started trading below 36950 level then strong downside fall possible in today's session. Same for upside 37500 is resistance level. If it starts trading above 37550 level then it indicates correction is over and banknifty will continue bullish rally towards the new high.