HI Beton,
Without the benefit of a humungous data engine at my knee..

Would you agree that when one picks up an old system that was working say 5 years ago, and it immediately produces a winner or 2 from a random meeting picked today(and tomorrow) using exactly the same 'rules', there is a reasonable chance that...

(a) it still has legs
(b) few others are following it


LG

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The trick isn't finding profitable angles, it's finding ones you will bet through the ups and downs - UB