Trend continued to be bearish as 20 day EMA hovers below 50 day EMA. Recently price not able to hold its head above 20 day EMA and headed below 20 day EMA. Expecting bank nifty would expire below the recent high. Option traders can sell 21200 call @74 and buy 21800 capp @ 20. Lot size. 20. Max profit of Rs.1080/-(in 3 holding period) if expires below 21200 level.