BankNifty thought it made gap up closed high but still it is in bearish trend kind of relief rally.By going with global markets closed at friday close we might open a gap down around 42500-42400 area , then we have 42400 area is crucial below price can test 42100 -42000 and above it will go for friday highs this is just possibility so keep checking price action on that level .
Supports are 42400,42100
Resistances are 42750,42900