Learning Jack Hershey's trading method is like learning a foreign language: the market's language. I can think of many similarities both in purpose and approach.
Learning a language's vocabulary and grammar won't make you proficient in that language. It is only the necessary beginning. In order to use them proficiently you need to get the feel of the new language. You need to know (feel how) to differentiate between words that in the dictionary have the same translation. You need to know (feel) when a grammatical rule doesn't apply.
When you try to read or speak in a language and you have difficulties, you won't overcome them by adding your rules and trying to force everything in a rigid system.
Maybe this is a good reasoning for those who try to backtest or automate Jack Hershey's trading method: there's no good automatic language translator, but there is a large number of bilingual and multilingual individuals.
Questioning if ym leads es (at es' end effect points) is like a German not wanting to accept that Americans call a certain thing subway, and Englishmen call it tube. Or on a funnier note think about what do they mean when they say they're "pissed"
Everybody who gets exposed to Jack Hershey's trading method is free to take whatever he agrees with, and apply however he likes it, but think about how this idea sounds if you applied it to the learning of a foreign language, and with what results ...
Believing that by watching Jack or Spydertrader trading for a couple of hours you'd become proficient at trading, is like believing that if you only listened a foreigner talking for a couple of hours you'd become proficient in his language. Everything will look easy, and you won't even recognize the subtle nuances.
Happy Thanksgiving everybody!
