Direct Answer
The share of total cryptocurrency market capitalization held by coins other than Bitcoin. It is the complement of Bitcoin dominance, and some providers also exclude stablecoins from the numerator. A rising share means altcoins are gaining market value faster than Bitcoin, and a falling share means the reverse.
Altcoin Dominance: Formula, Meaning, Signals, Examples and How to Use It
How Is Altcoin Dominance Calculated?
The share of total cryptocurrency market capitalization held by coins other than Bitcoin. It is the complement of Bitcoin dominance, and some providers also exclude stablecoins from the numerator.
Formula: Altcoin dominance = (total crypto market cap - Bitcoin market cap) / total crypto market cap
Inputs:
- Total crypto market capitalization
- Bitcoin market capitalization
- Optional list of excluded assets such as stablecoins
Worked example. With an illustrative total market cap of 2100 and Bitcoin at 1200 (billions of USD), altcoin dominance is 42.9%. The inputs are illustrative numbers, not market data.
Reading it. A rising share means altcoins are gaining market value faster than Bitcoin, and a falling share means the reverse. It is a relative measure: it can rise while altcoin prices fall, if Bitcoin falls more.
Limits. The total depends on which assets the data provider counts, and market caps use circulating supply figures that can be inflated by thinly traded or locked tokens. Stablecoin treatment changes the number noticeably.
What is Altcoin Dominance?
The share of total cryptocurrency market capitalization held by coins other than Bitcoin. It is the complement of Bitcoin dominance, and some providers also exclude stablecoins from the numerator.
How to use Altcoin Dominance
A rising share means altcoins are gaining market value faster than Bitcoin, and a falling share means the reverse. It is a relative measure: it can rise while altcoin prices fall, if Bitcoin falls more. A reading alone is never a buy or sell signal; it needs context from price structure, volume, volatility and the broader market regime.
Strengths
- As the complement of Bitcoin dominance, the measure is a single share between 0 and 100 percent that always pairs with a known counterpart.
- It aggregates every non-Bitcoin asset into one number, which gives a compact view of how value is split between Bitcoin and everything else.
- Reproducible when the formula and data convention are fixed.
Weaknesses and limitations
- Because it is a share, it can rise while altcoin prices fall, if Bitcoin falls faster, so a higher reading does not mean altcoins gained.
- A single large asset such as Ethereum can account for much of the numerator, so the series may follow one coin more than a broad basket.
- Correlated indicators can create false confidence by repeating the same underlying information.
Editorial and risk note
This page is educational content, not individualized investment advice. It should not imply guaranteed prediction, accuracy or outperformance.
Frequently Asked Questions
Is Altcoin Dominance a buy or sell signal?
No. A rising share means altcoins are gaining market value faster than Bitcoin, and a falling share means the reverse. The total depends on which assets the data provider counts, and market caps use circulating supply figures that can be inflated by thinly traded or locked tokens. A trade built on it still needs a trigger, an invalidation rule, a position size and realistic execution assumptions.
What is the best setting for Altcoin Dominance?
Altcoin Dominance is computed from total crypto market capitalization; bitcoin market capitalization; optional list of excluded assets such as stablecoins, so the choices that matter are the data convention and the window it is read over. Test those across instruments, regimes and out-of-sample periods instead of fitting one historical winner.
Can Altcoin Dominance be used by itself?
The total depends on which assets the data provider counts, and market caps use circulating supply figures that can be inflated by thinly traded or locked tokens. Stablecoin treatment changes the number noticeably. For that reason it is read next to measures of direction, participation, valuation, liquidity and risk, not alone.
Does Altcoin Dominance work on every timeframe?
The calculation (Altcoin dominance = (total crypto market cap - Bitcoin market cap) / total crypto market cap) can be run on any bar size, but behavior is not portable: a reading on a five-minute chart describes a very different market window from the same reading on a daily chart. Validate the exact timeframe before relying on it.
Why does Altcoin Dominance give false signals?
Because it is a share, it can rise while altcoin prices fall, if Bitcoin falls faster, so a higher reading does not mean altcoins gained. A single large asset such as Ethereum can account for much of the numerator, so the series may follow one coin more than a broad basket. Lag, noise and regime changes add to this, because market participants react to new information after the reading is calculated.
How should Altcoin Dominance be backtested?
Rebuild Altcoin Dominance from total crypto market capitalization using point-in-time data, write the rules before testing, include delisted securities where relevant, model realistic fills and costs, reserve a validation sample and compare with a simpler baseline.