# Interval Timebound

## Definition

Typically metrics are computed by taking into account all coins/tokens.

For some metrics, it makes sense also to compute a derivation of them on the subset of coins/tokens that have been moved at least once no longer than X and no less than Y days/years ago.

UTXO blockchains naturally define the age of a coin, but this is not true for account-based blockchains. To define the age of a coin in account-based blockchains we developed our own Coin Age Model

Interval Timebound metrics names are formed from the original metric name plus a interval timebound suffix. Available interval timebound suffixes are:

`0d_1d`

- 0 to 1 day`1d_7d`

- 1 to 7 days`7d_30d`

- 7 to 30 days`30d_60d`

- 1 to 2 months`60d_90d`

- 2 to 3 months`90d_180d`

- 3 to 6 months`180d_365d`

- 6 months to 1 year`365d_2y`

- 1 to 2 years`2y_3y`

- 2 to 3 years`3y_5y`

- 3 to 5 years`5y_10y`

- 5 to 10 years`10y_20y`

- 10 to 20 years

Examples:

- realized_cap_hodl_waves_3y_to_5y - The Realized Cap HODL Waves metric is computed by considering only the coins/tokens that were active in the past 5 years but not less than 3 years.
- spent_coins_age_band_60d_to_90d - The number of tokens transacted at least once on a given day that are older than 60 days but not more than 90 days.