One coin's daily derivatives trading volume, venue by venue, over time

One coin's derivatives trading volume over time: per UTC day, oldest first, the US-dollar volume traded in the coin's perpetuals and dated futures together on each tracked venue that reports it, largest first, with their total — a total over those venues, not the whole market. Full days only: the day in progress is never included, and the newest day is yesterday once its figures are published (until then, or from a cached answer, it can be the day before). A venue with no figure for a day, such as one that did not list the coin yet, is left out of that day, and a day no venue states is left out, so days can skip. Each figure is the venue's own daily total as the venue states it: it can differ by about a percent from a sum of the same day's candles, a venue closed at weekends (CME) can still state weekend volume, and a one-day spike is passed through unsmoothed. An answer may be served from a short-lived cache. symbol is the coin ticker (e.g. "BTC"), matched case-insensitively — not an instrument id, not a token mint or contract address, and not scoped to any of this API's chains. An unknown ticker answers 404.