Speaking of range, here is my chart. I have it setup to show from 09:30ET to 16:00.
Today you see the range was exactly 103 points. I drew a line at 40. What's more important than average in my opinion is the mean. But even more simply, its where are most days. Most days fall around 40. So getting 25 or 30 points a day would mean capturing a huge chunk of the range, which isn't too realistic.
I used to use 10 point targets, and had good stats for this, but then it dried up since the range dropped (I think these were my stats from 2015 or so). All of a sudden, my trades weren't working as well, and stats dropped. Of course by using a smaller stop, that has its own set of problems. But to me, it really is just a matter of stop, target, win rate.
My whole point is you seem excited by big days, but since these aren't too common, and you can't really build a day trading strategy around getting 20 points, you gotta focus on smaller targets, tight stops, and trades that set up many times a day. Then it doesn't really matter what kind of day it is because each day will have a few pieces for you to take.
(after saying all this, you also have to know when you can break your rules and expand targets)
I of course know you know all this cause it sounds like you've been around for a while, but you need focus. You're chasing money, but you should be chasing consistent wins, even if its just a bunch of +5 point trades.