2021-March-18 Expiry day sell-off

The day started with a good volume buy candle. 300k+ Volume touching 14900.
After 3 pairs of Long-Shorts. Sell-off started from 12:30 to 1:30 PM. shaving 200 points.
14600 felt like a bounce-back level. A bounce happened to 14675 but fell again and closed at 14600.