As you can see. Key levels and true TA are no joke. The reason this works so well is because of two things.
1. These are areas where heavier buying and selling create natural entry and exit points - meaning - people that long get stuck if price goes down. People that short get stuck when price goes up. So when price returns to their entry level, they tend to get out and close their position. That then moves price as if new postions open. What does this mean - It means when lots of shorts close price will move up without any new buys. When lots of longs close, price can move down even without new shorts. This happens naturally because the two opposites grow/shrink in weight constantly pushing against one another. This is basic market structure.
2. Confluence is when multiple heavy weighted buying and selling areas show up close to together plus TA tricks start happening to line up as well. Meaning - lots of longs open at a particular price, then price moves away from them going down , you then notice your fib retracement 618 level is at the exact spot where the longs opened. This becomes a strong area to watch for how price will reject or find retrace support after breaking through. When lots of your general analysis start lining up at a particular level, this is called confluence.
Traders need to learn to "react" to pre planned key levels. Do not chase price action. That is the secret to trading.