NSE:BANKNIFTY 35000 calls are written heavily which is at the money; hence if 35000 is crossed in the morning it will quickly reach 35100 and if that level is also breached 35350 is on the cards. 35000 is also the 61.8% retracement of last fall. on the downside if 34700 and 34560 are very important levels. if 34561 is crossed on a 15min close basis then 34400 very important support may get broken. banknifty shows a bearish view on OI data