Bank nifty Expiry Hero or Zero Trade.

Bank nifty is looking neutral to short side at this point but as this is expiry day either side from current level can give a huge momentum so below 42200 if banknifty sustain then we can see downlevels from here, and if nifty crosses 42400 levels and got sustain till one hour then 42650+ levels is going to see on chart.
so as of now we can go in strangles:-
It is hero zero call and put option strangle
Buy 42400 call option at 18
and
buy 42000 put option trading at 26

this is purely hero zero call so there is no stop loss. please trade carefully with less qty. Chances are high any side move can give you huge price appreciation in given strike price.