# Sum Coin Age Distribution (SCA Distribution)

Sum Coin Age Distribution(SCA Distribution) shows the distribution of Long-Term Holder and Short-Term Holder with UTxO data

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.

$P(X=[a_i, bi))= \frac{\sum_{u \in utxos} \text{lifespan}_u * \text{value}_u * \mathbb{I}(a_i \leq \text{lifespan}_u < b_i)}{\sum_{u \in utxos} \text{lifespan}_u * \text{value}_{u}}$

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