One thing i hate about all the chart patterns is placing a stop-loss at the pattern lows. That spoils a RR Ratio.
Bullish Flags are continuation patterns it assumes that the prevailing trend will continue after the breakout.
So why keeping stop-loss at the pattern low?
If the trend is strong then breakout will be as strong as a trend too.
I don't applying a re-test theory in my trading with short term patterns
We are trading probabilities, we can't predict future prices, but we can trade what is probable as per our learning and experience.