Nifty 50 rebounded after two days of correction and formed a Bullish Engulfing candlestick pattern on the daily charts on Feb 27, but overall, it has been in a range of 21,950-22,300. Hence, the index needs to break the range on either side to get into a firm direction, experts said, adding if the index decisively manages to surpass 22,300 then 22,500 is the level to watch out on the higher side.