Altcoin Season Index
As of 28 October 2026 the index is 65/100: 31 of the top 48 altcoins beat Bitcoin over the last 90 days. That is neutral — not alt season (75+).
Over the last year the index never reached alt-season territory (75+). Bitcoin-season territory: 98 days; most recently 1 September 2026.
Green band: altcoin season (75+) · orange band: Bitcoin season (≤25) · last 12 months, daily
Reading alt season together
The index alone isn't enough. BTC dominance falling while TOTAL3 rises means money flowing into alts; BTC dominance falling while USDT dominance rises means money leaving crypto, not alt season.
Frequently asked questions
Is it altcoin season?
As of 28 October 2026 the index is 65/100: 31 of the top 48 altcoins beat Bitcoin over the last 90 days. That is neutral — not alt season (75+).
What is the altcoin season index?
The share of the top 50 altcoins (excluding stablecoins and wrapped tokens) that beat Bitcoin over the last 90 days. 75+ is altcoin season, 25 or lower is Bitcoin season.
When does altcoin season start?
Nobody can give a date. Signs to watch: the index above 75, BTC dominance falling while TOTAL3 rises, and USDT dominance falling.
Method: the top 50 altcoins by CoinGecko market cap (excluding stablecoins, wrapped and staked derivatives; those with a Binance USDT pair), 90-day return from Binance daily closes vs Bitcoin's over the same period. Past values use today's list. Updated every 6 hours. Informational.