# Coverage and freshness

Working definition: in the Stablecoin Scanner's method, which chains and tokens are indexed, and how up to date each figure is.

Canonical: https://achivx.org/glossary/coverage-and-freshness/
Updated: 2026-11-01

In the Stablecoin Scanner's methodology (working definition), coverage is which chains and tokens the scanner indexes, and freshness is how recent each surface's data is. Its observed history is everything it has indexed, starting at a date rather than at each chain's genesis. Row feeds print their own freshness line, such as minutes ago and blocks behind head. When that status cannot be fetched the line prints nothing, under the rule 'unknown ≠ current: say nothing rather than imply fresh'.

## What the sources say

| Source | Quote | Link |
|---|---|---|
| ACHIVX Academy: what the page covers | "Which chains and tokens the scanner indexes, how fresh each surface is — and how the interface refuses to imply freshness it cannot prove." | [achivx.com](https://achivx.com/academy/concepts/coverage-and-freshness.html) |
| ACHIVX Academy: freshness lines | "Row feeds are near-live and print their own freshness line — “indexed through 4 min ago · 16 blocks behind head”" | [achivx.com](https://achivx.com/academy/concepts/coverage-and-freshness.html) |
| ACHIVX Academy: unknown is not current | "When that status cannot be fetched the line prints nothing: the code’s own rule is “unknown ≠ current: say nothing rather than imply fresh”." | [achivx.com](https://achivx.com/academy/concepts/coverage-and-freshness.html) |
| ACHIVX Academy glossary: observed history | "everything the scanner has indexed — the ground every figure stands on. It begins at a date and not at the chain’s genesis" | [achivx.com](https://achivx.com/academy/reference/glossary.html) |

## Related terms

- [Left-censored date](/glossary/left-censored-date/)
- [Organic volume](/glossary/organic-volume/)
- [Exchange netflow](/glossary/exchange-netflow/)

## See also

- Explainer: [Coverage and freshness](https://achivx.com/academy/concepts/coverage-and-freshness.html)

Checked against the sources on 2026-11-01.

## Sources
- https://achivx.com/academy/concepts/coverage-and-freshness.html
- https://achivx.com/academy/reference/glossary.html