Bearish until it breaks the resistance level as the banknifty is weaken it could bleed.It may tends to reverse from resistance level which is 330 followed by 342.one could look after short sell. Note - its my personal view with my own analysis,you must add on your own analysis before initiating a trade.
21487 was the level where market tends to resist and tested for 2 times in few consecutive trading days and one more time it tested back but tends to reverse from that point which makes the pattern bearish. It is just a view according to my analysis.