Because Zone Pattern Probability Analysis is a method based on statistical projections from historical market data, it is basically completely objective and testable by yourself.
That means it can be done for a full-scale backtesting. But I haven't got time to do it by myself yet.
Search their website. They have a free pdf on jackson zones.
I bought the book a while ago. As usual, there was nothing spectacular in it.
Why?
Because even though a zone may have a 70% chance of not being violated, the closer you get to the zone the greater the probability that the zone will be violated. This is true whenever you hear any statistic about "prices will not violate this zone 70% of the time". Well, if you run the statistics on prices touching in front of the zone you will see that the 70% turns to 30%, as an example....if you get my drift...