Breakout strategy works well when stock breaks previous highs and sustain above the trendline, so we can expect the bullish move ahead
If share sustains on after breaking the trend it can give good amount of returns in short time, It's depends on trader to trader, how long they want to hold on the trade. It is always better to keep stop loss at each high, without stop loss the trade can leads to huge loss.
Ipo based breakouts always works good when it breaks the first day high, but while trading such stocks we need to keep watch on the movement of the stock when it breaks the high. if breakout don't sustain it can leads to lose. and if it sustains there is high probability of good returns in few days. This is just my own opinion, trade using your own strategies and risk.
Perfect retest after breakout is the best indicator for good bullish move of the share.