What your numbers can and cannot tell you — and how many trades it takes before any of them mean anything.
Expectancy, why a win rate on its own is meaningless, how large a sample has to be before a difference is real, what a losing streak proves, and how to tell a broken edge from an ordinary bad month.
In the app the same chapter ends in your figures rather than an example: how often you did the thing it describes, over your last ninety days. You pick one change to make, and Evidence checks afterwards whether it actually changed — from your journal, arithmetic, no opinion involved. Questions you get wrong come back a week later and again a month after that.
Open the free plan →