# Definition

Mean Coin Age(MCA) is the mean value of products of coin unspent transaction output alive days and its value.

$MCA=\frac{\sum_{u \in \text{unspent outputs}}\text{lifespan}_u*\text{value}_u}{\sum_{u \in \text{unspent outputs}}\text{value}_u}$

# Interpretation

MCA is similar to CDD but focuses more on unspent transaction output. Mean Coin Dollar Age is the sum value of products of coin unspent transaction output alive days, value, and the price at the created time. This indicator enables estimating the Long-Term Holders' portion.

• Mean Coin Age(MCA): An indicator shows the distribution of UTxO holders. It is calculated as the mean value of the products of bitcoin unspent transaction output alive days and UTxO value.

• Mean Coin Dollar AgeMCDA): Similar indicator to MCA, but this indicator is calculated with USD value.