If you use the buy dip system, the profit will definitely be obtained but I think the goal is too simple if you have to stop and sell when the current price is still below so I think instead of having a pattern like this and regretting it when the price is high, it's better from now on not to have a lot of thoughts and just focus on the future.
On the first point, buy the dip and sell is what traders often do. While in this thread someone must find a way and be consistent about his investment goals where to buy the dip and hold.
The simple thing is that the short term gains from a trade sometimes just won't be worth the risk, so the extra consideration is to buy and hold for the long term in hopes of getting a decent return. But it looks like you have understood how it works, so just implement it.