The point at which you currently find yourself with respect to reviewing the Original Journal, the DU5, DU10 & DU20 equations do not compare to our current method of Dry Up Volume calculation. You are comparing apples to oranges. As you progress with your review, you'll see the complete explanation describing the rationale behind using a 'range' of dry up values, as well as, the statistics behind the methods. The resulting changes provided an increase in trade signals without significantly increasing the number of False (Failed) Breakouts (FBO's). In addition, using a 'range' of values may very well, as you suggest, capture the volume levels that exist on the day "just prior to" the 20% run in price. Ideally, an automated method which exactly mirrored Jack Hershey's 'eyeball' method (see Oddiduro Thread - previously linked) should provide Dry Up Values which resemble the Hershey Eyeball Methodology.
- Spydertrader