Data that lies: frozen prices, missing values and unadjusted splits
Catch silent data errors before they reach a signal or a backtest.
Module 15 of 26, Testing an idea honestly before you use it. Lesson 8 of 8, about 16 minutes.
The takeaway
Before you trade on a signal, check that your data is fresh, matches a second venue and passes an independent calculation check.
This page is a public summary. The full lesson has the worked examples, an interactive exercise and a short quiz, and sits in the course. Lessons 1 and 2 of Module 1 are free and the rest need a pass.
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