Why should I have exited the trade?

1. I took trade because of breakout of the level (green line 146.8). 23 feb 9:15
2. But price goes below my buying level at 14:15

I should have exited the trade at this point, where price going below my buying candle low.


When price goes below the low of breakout candle
Exit the trade.

Or enter in opposite direction.