Item History

Chart-ready price history: the series, our own price, stock gaps and the statistics.

Distinct from /snapshots, which returns rows. This returns a reading of those rows — what it usually costs, whether today is cheap by its own standards, when it was unavailable — because that is the question a chart gets opened to answer, and computing it in the browser would mean every client reimplementing the held-reading rule and getting it subtly wrong.