BNF looks week and can short at current level 18800, if it retraces please wait to see and short at 18910 or 18985 levels for the target of 18512. If you are taking short position at 18910 keep SL of 19060
Looking at the chart Nifty is trading at the top line of Channel. Its a good opportunity to short Nifty. If it breaks the channel and closes above the top line of channel only then we should take long position.