Why it matters
A chart can appear convincing historically while behaving differently during the live bar. For a stream-facing systematic environment, the displayed behaviour should be understood under both conditions.
What is inspected
Research focuses on repaint-like behaviour, confirmed values, state persistence, timing differences, and whether a reload changes what a viewer would have seen in realtime.
Promotion rule
A visually interesting observation is not treated as production-quality evidence merely because it looks coherent on historical bars.