Banknifty Analysis for 17 Dec

Here i got some crucial levels for 17 dec. There is a huge supply at 30800 level. Banknifty tried many time to sustain above 30800 but failed. If banknifty sustains above 30800 levels atleast 30 min then it can run upto 31400. Banknifty forming ascending triangle pattern also. So trade according the levels.