Nifty had an area gap on october 4th with mild increase in volume, which is not yet filled.
Yesterday nifty started as gap up, but closed as low as possible, which formed an exhaustion gap as well as engulfing candle.
In all three aspects Nifty appears to be Bearish. If Nifty goes below the current suport at 10100-10200 range, it will go bearish.