The range for the Bank nifty on 27th may monthly expiry could be around 700 pts. from 34400 to 35200. 34640 to 34700 is a no trading zone for tomorrow. If market opens slightly down below 34640 then we can see a down side momentum till 34400 as first target 34120 as second target. If market opens above 34800 we can see around 450 points upwards momentum. This is just my analysis and purely educational purpose only.