Well, if you check with ForexFactory you will find many posts and threads regardings his OneNightStand and FirstStrike system. Both were published in the erly `90s (I got the books). And obviously they are VERRRRRRY successful. A guy named Joel Resink is publishing those systems for free via his blog at infiniteyield dot com.
And if you understand German, there`s a long thread including details, statements, yournal etc on forexfabrik dot de. From dedicated practitioners.
I read the books many, many years ago the first time , read Krutsingers admission, that he doesn`t trade personally, had my thoughts about writers and traders and never ever traded the systems. Foolish me!
Regards
Hittfeld