> For the complete documentation index, see [llms.txt](https://userguide.cryptoquant.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://userguide.cryptoquant.com/cryptoquant-metrics/utxo/sum-coin-age-sca.md).

# Sum Coin Age (SCA)

## Definition

Sum Coin Age ( SCA ) is the sum value of products of coins unspent transaction output alive days and its value.

## Interpretation

Sum Coin Age (SCA) is sum of ‘Alive days’ combining the days of all coins that was in a kept single wallet. SCA has a tendency to increase in value in principle because more BTC is being mined and not all BTC move all the time.

* **Sudden decrease**: Coins that were dormant moved in mass- **Volatility Risk or Possible Trend Reversal**
* **Continuous rise**: the total days of coins alive accumulates 

  Continuous rise in SCA is normal in general but could turn to sell pressure when price begins to rise in sudden.

## Link to Our Data

* [BTC: Sum Coin Age Live Chart](https://cryptoquant.com/asset/btc/chart/network-indicator/sum-coin-age?window=DAY\&sma=0\&ema=0\&priceScale=linear\&metricScale=linear\&chartStyle=line)
* [BTC: Sum Coin Dollar Age Live Chart](https://cryptoquant.com/asset/btc/chart/network-indicator/sum-coin-dollar-age?window=DAY\&sma=0\&ema=0\&priceScale=linear\&metricScale=linear\&chartStyle=line)


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