The people watching l2, charts, and trades after some time get a feel for the market direction. I do this myself, I can sense sometimes before spikes and drops and use that dayttading to make money (I suspect this guy is doing the same with some troll moves thrown in unfortunately), but I do it as a side job, so not as good as the professionals doing it for a living. But I follow the good ones to improve.

Here is someone really good at recognizing good plays:

https://investorshub.advfn.com/boards/profile...ser=116525