Bank nifty has strong support at 49630 to 49780. Until it broken there are no PE trades. If you have doubts of trend reversal look at higher time frame and look at previous candle high or low is broken by the present candle. If none then its sideways, if low is broken then look for PE trades and if high is broken then look for CE trades. Sideways take confirmation on higher time frame before taking trade in shorter time frame.