Looking back at the chart I’m trying to see what not self explanatory. I don’t know how much you know about charting it occurred to me. Even support over sold or resistance over bought. Support is bottom. Like like a ball bouncing off the floor and when it hits the ceiling that’s resistance. Now it it has enough force to blow through the ceiling it had a new high in store “ in most cases” and now the ceiling is the new floor or support you don’t want to let it breach or go below that.
PS he didn’t do that chart as past tense it was there and up grades as it went along.