As per Wyckoff Trading. Currently BankNifty is in Accumulation Phase. The probability of Market retesting the Demand Zone is more than the breakout. BankNifty could not sustain the Fib retracement of 38.2% and also the 22000 breakout price.
Bank Nifty on 15 min chart, 31110 is acting as resistance, which was acting as Support earlier. 30950-30900 is acting as Support. BUY above 31110 and SELL below 30950.