About 10 years
By strategy metrics do you mean performance KPIs of the strategy eg r/r, Sortino etc
ie portfolio KPIs
Or, do you mean metrics unique to the Strategy?
I've my own metrics unique to the Strategy but each one is a vast topic in itself
For example, "BiBeta" is a unique metric
Within the Strategy, it measures the contrast between the Beta[bull] of vol & the underlying during bullish periods vs the Beta [bear] during Bearish periods, and there's beta [neutral].
See, often "experts" refer simply to the beta between 2 instruments but it's fallacy, or is inadequate for strategic purposes.