Free Tool
BTC Dominance
Live Bitcoin & Ethereum market dominance, plus the Altcoin Season Index — see whether BTC or altcoins are leading the market right now.
BTC Dominance
ETH Dominance
Others
Market Cap Distribution
Altcoin Season Index
How many of the top 100 coins (excl. stablecoins) outperformed BTC over 90 days
Performance vs. BTC
Price change for eligible top-100 coins (median, stablecoins excluded)
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Try Zest ExchangeWhat is BTC Dominance?
Bitcoin dominance measures Bitcoin's share of the total cryptocurrency market cap. A rising dominance means capital is flowing into BTC relative to altcoins — a sign investors prefer BTC's relative safety.
What is Altcoin Season?
Altcoin Season occurs when the majority of the top 100 cryptocurrencies outperform Bitcoin over a given period. An index above 75 signals altcoins are leading; below 25 means Bitcoin is dominant.
How is the index calculated?
We check how many of the top 100 coins (by market cap, excluding BTC, stablecoins, and wrapped BTC) had a higher 90-day price return than Bitcoin. The result is expressed as a 0–100 score using established methodology — updated hourly from live market data.