The last window seconds of a match's fills as canvas dots (same schema as the live dots stream: [t_ms, market_id, price_bp, usd_cents, side_yes, significant, mask, taker, name]). Public; used to freeze the cockpit at the end of a finished match (QA 05.09, blocker 1). to = the match's last fill (or now for a live one).

The ceiling was 1800 until 15.09.2026, and the cockpit asks for 6h (Cockpit.tsx, the one lazy whole-match pull that looks for the biggest fills when the 4-minute window holds nothing of size). So every one of those calls answered 422, the component never set its state, and live.tick re-fired the effect every 5 seconds for the length of the match: 613 refusals in the week 07-13.09, 180 more on 15.09 alone, all on live matches, all with our own match page as the referer. Measured before raising it: a 6h window on a live CS2 match is 2,556 fills, and the endpoint answers the largest allowed window in 0.26s / 21KB. 12 x 1800 = 6h exactly, which is the longest a BO5 plus its pre-match trading runs.