Ah, yes, I follow now. But sadly, the exact same setup does occur earlier, with not a profitable outcome if the trade was taken. At 2, we see that price makes a lower low with reference to 1, and the tick does not make a lower low. So it seems like this divergence might signal a long trade. But alas, price keeps going down.For the example I pointed out, the 'extreme' reading was the lowest print on that day and as ES made its lowest print on the day, NYSE TICK wasn't able to match that. In other words - the broader market was ticking higher by then.
Anyway, its just an example to show how sometimes it works, and sometimes it doesn't. I can see why its not good enough to keep going down this road.

..yes..it is moot..in fact it doesn't really matter to the small retail trader who is doing what..or why they are doing it..the only thing that matters is the bottom line..can i make some money spending my precious time trading this market..and..the answer is definitely yes..once a few simple rules are followed..and some basic knowledge of chart reading and order entries are understood..and more importantly..practiced beforehand