Interactive teaching lab · synthetic data

How large is this candle body for its recent scale?

Choose a scenario, step through the causal rolling median, and inspect why an unchanged body can receive a different descriptive class. No class is a forecast or trading signal.

All displayed observations are deterministic teaching fixtures, not provider data. The median window and thresholds are package choices. A historical study must declare session, price basis, point-in-time availability, and data provenance.