Why geometry works with numbers ... well, I could show you some of the stuff I have been working on, and numbers... regardless as how random or linear they may seem, have value associated.... sort of like Karma. Guessing when your going to get your Karma, is Forex ... a fickle bitch.
The chink in this armor, is pretty straightforward... follow the trend. Guessing or estimating trends can be prosperous, but will only work as long as your long term strategy is following the trend. A simple analogy is swimming against the current, although your destination might be the shore, sometimes you will find a horizontal vector to the shore a better approach.