My very first trading book 23 years ago, cost $100 and was about Gann angles, Gann charting etc.
I attempted to study its contents, kept the book for years and could never make head or tail of the gibberish.
It was a total waste of $100 and I gave the book away free to a Amibroker guru about 2 years ago.
The whole Gann crap is just that, crap, imo.
That was my first lesson in being stung by TA con artists.
Maybe that's what's confusing Surf about TA.
May require a TA detox clinic after Gann.