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Altcoin Season Index

Is It Altcoin Season Right Now?
Updated 10/31 08:01 UTC+8
53 / 100
Transition
vs yesterday +10

On 10/31 the Altcoin Season Index is 53: over the past 90 days, 53% of the top-100 coins outperformed Bitcoin. The market is in the transition zone — not a clear altcoin season yet. BTC dominance is 59.71%, −0.29 pp vs yesterday.

Yesterday
43
Last Week
52
Last Month
61
BTC Dominance
59.71%
Index History
Past year, daily
BTC Dominance (BTC.D)
Past 90 days

About This Metric

Definition
Measures how many of the top 100 altcoins by market cap are beating Bitcoin.
How to Read
Above 75 is altcoin season, below 25 is Bitcoin season, and in between is a transition zone.
  • Coins are ranked by market cap, skipping BTC, stablecoins and wrapped tokens; the top 100 are taken and we measure the share whose 90-day return beats BTC.
  • Values before 2026-08-11 are backfilled estimates, recalculated with the current members.
Source
Public market-cap data
Caveat
The index describes market state, not a trading signal. A falling BTC dominance moves with a rising index, so the two can cross-check each other.
Sector Performance
24h change across 51 sectors
Strongest Sector
Tool+7.90%
AI+6.18%
BNB Eco+5.54%
Weakest Sector
Entertainment−12.01%
Modular Blockchain−9.99%
Robinhood Eco−3.73%
See relative strength across all 51 sectors →

Turn "Altcoin Season Index crosses 75" into a backtestable rule and get alerted the moment it fires.

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