History
The same coordinates, every session since 2010. The maturity is fixed by construction: "30 days" means the same thing on the first day of the series and on the last. That is the only reason a line this long means anything.
At-the-money volatility, central skew, and 270-day minus 30-day — every session
← the figure is wider than this screen — drag it sideways →
One state per session, at 16:00, for all 3,494. Half-hourly states — up to thirteen a session — are on the intraday page for 306 of them. Same pipeline throughout: quoted chains, one linear program with exact bid-ask and calendar constraints, then the permanent grid. Nothing here is fitted to history.