Yeah, and Nostradamus also knew "Hister" would come. We just curve-fit that guy's prediction to whatever works these days.
I wanted to bring something up to give you another sense of perspective, regarding your desire to try to balance ratios between YM,NQ,ES.
Here's a screen shot of my current positions in MNQ and MES. I took both of these positions long at exactly the same time just before market halt yesterday. So they are equal in time of entry and size. One contract each.
Here is what they look like as of the timestamp of like 20 mins ago...
View attachment 219720
What I am trying to show here is how the strongly-correlated markets, as you have called them, can diverge in price difference. This is what it looks like now.
I hope this helps you trying to figure out your ratios of YM-to-NQ-to-ES should you continue that study.