class-imbalance

1 free lesson tagged class-imbalance across AI. Each one is a short sequence of focused steps with narration and a five-question quiz at the end — take them in any order, no signup required.

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Why Reported Order Book Results Do Not Replicate

At a one-event horizon, 92 percent of mid-price labels are exactly no-change, so a model that always predicts flat scores 92 percent accuracy. This lesson computes that baseline across horizons and works through the four mechanisms that turn a genuine measurement into a number nobody can reproduce.

10 steps·~15 min

Why Reported Order Book Results Do Not Replicate

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