This is the continuation of the Law ofthe Charts. Basically this is one of the best methodologies for price action analysis. The approach of Joe Ross can be historically tested because it offers more precision than any onther chart pattern method.
It is funny that there are some softwares for pattern identification on which you can do a backtesting. But you do a backtesting on the software and not on the chart patterns because thei perception can vary from person to person.