How the hell do these guys base their trades on?

Check this out:

Billion Dollar Day - Currency Trading Documentary - YouTube

For exemple between 04:00 & 05:00 this chinese guy buy some pounds but why ??

Seems like the guy just look at the price there’s not even a chart he’s like " ok it’s going up so imma buy :cool: **** YEAH ".

Please Enlighten me gentlemen. :64: