Remove duplicates, detect and handle outliers

This lesson is for enrolled learners

The concept in plain words Two data-quality problems show up constantly once you're pulling real market data: duplicates (the same timestamp appears twice — often from overlapping API pagination, or re-pulling a date range you already had) and outliers (a value that's wildly inconsistent with its neighbors — a candle showing a 500% price spike that reverts the next tick,……

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