# Sum Coin Age Distribution (SCA Distribution)

## Definition

Sum Coin Age Distribution(SCA Distribution) shows the distribution of Long-Term Holder and Short-Term Holder with UTxO data. It is similar to UTxO age distribution but weighted by alive days(=age of each UTxO) to highlight long-term holder's distribution. Each field is calculated as the sum of the products of coin unspent transaction output alive days and its value in a given period, divided by their sum. 

$$
P(X=\[a\_i, bi))= \frac{\sum\_{u \in utxos} \text{lifespan}\_u \* \text{value}\_u \* \mathbb{I}(a\_i \leq \text{lifespan}*u < b\_i)}{\sum*{u \in utxos} \text{lifespan}*u \* \text{value}*{u}}
$$

$$
\[a\_i, bi) \in \[\[0, 1d), \[1d, 1w), \[1w, 1m), \[1m, 3m), \[3m, 6m), \[6m, 12m), \[12m, 18m), \[18m, 24m)\ \[2y, 3y), \[3y, 5y), \[5y, 7y), \[7y, 10y), \[10y, \inf)
$$

## Interpretation

SCA Distribution is similar to UTxO age distribution but weighted by alive days to highlight long-term holder’s distribution in different ranges. If the long-term SCA Distribution ratio increases, then it could be interpreted as the coin's future value is greater than the current value.

The range of SCA Distribution is as below

* Less than 1 Day
* 1 Day to 1 Week
* 1 Week to 1 Month
* 1 Month to 3 Month
* 3 Month to 6 Month
* 6 Month to 12 Month
* 12 Month to 18 Month
* 18 Month to 24 Month
* 2 Year to 3 Year
* 3 Year to 5 Year
* 5 Year to 7 Year
* 7 Year to 10 Year
* 10 Year to Infinity

## Link to Our Data

* [BTC: Sum Coin Age Distribution Live Chart](https://cryptoquant.com/asset/btc/chart/network-indicator/sum-coin-age-distribution?window=DAY\&priceScale=linear\&metricScale=linear)
* [BTC: Sum Coin Age Distribution (SCA Distribution) API Docs](https://cryptoquant.com/docs#operation/getSCADistribution)