How These Numbers Are Produced

Public endpoints, a daily build, and a stated limit on each figure.

Everything here is computed from public exchange endpoints at build time. There is no private feed, no paid vendor, and nothing is modelled or smoothed.

Sources

Figure	Source	Cadence
Perpetual funding, per venue	Bitget, Bybit and Binance public endpoints	Daily
Symbol prices, volume, breadth	Bitget public v2 tickers	Daily
Market cap, dominance	CoinGecko public API	Daily
Fear & Greed	Alternative.me	Daily
Standard fee rates	Each exchange's published schedule, confirmed by hand	Re-confirmed every 90 days

What the numbers are not

Not a daily close. Each archive page is a snapshot of the moment the build ran, stamped in UTC on the page. Exchanges do not share a close, so there is no honest way to produce one.
Not your fee rate. Published standard-tier rates. Volume tiers, maker rebates and any rebate arrangement move your real cost, usually downward.
Not a recommendation. The calculators tell you what a position costs. They do not tell you whether to take it, and the site will not.

Corrections

A dated page is never rewritten once published — an archive that edits its own history is worth nothing. If a figure is wrong, the correction is added to the page and noted, and the original value stays visible.

Fee data freshness

Any page quoting a fee schedule is held back from indexing when the underlying figure has not been confirmed against the exchange's own page within 90 days. That is enforced in the build, not by discipline.