You just described part of my process, of course I would never sell at the first A or buy at the first B, and that's part of my edge.
I agree that having an Idea about where is Low and where is High as relative to the TF you intend to trade is the key for successful trading, very simple but effective KISS...
Exactly, I would never either, there's much more to picking trades, I was showing these as an example to prove my point. I really think a good price action reader who is very familiar (specialized) to certain markets can do very well. I mainly focus on the EURUSD and trying to get better at the ES but there are very specific ways those markets move and if traded correctly you can perform very well. Of course it's very difficult though.
For example, I look at oil and even other currency pairs and they move in different ways that I haven't studied therefore while I can trade them since they follow PA principles I would not do well in them at the moment I believe. I think my edge is reading the PA well for my specific markets, managing trades actively, understanding the market depth, the participant psychology (does one side give up, is one side trapped, are both sides fighting for market control, etc), and then risk management (structuring trades with good trader's equations - incorporating risk:reward)