Altcoin Season Index
The index measures one question: how many of the 50 largest altcoins beat Bitcoin over the past 90 days? At 75% or above it is altcoin season — market breadth is carrying returns. At 25% or below it is Bitcoin season: capital concentrates in the largest asset. In between it is neither.
For a portfolio this is not a buy or sell signal but a breadth measure — much like asking whether an equity index is carried by a few heavyweights or by many constituents.
Neither altcoin nor Bitcoin season
60/ 100
Bitcoin season ≤ 25Altcoin season ≥ 75
60.0% of 50 evaluated top altcoins beat Bitcoin over 90 days. Bitcoin itself is at +23.2% over that period. As of Oct 30, 2026.
Index History
Bitcoin season Altcoin season
The last Bitcoin season ran from Aug 30, 2026 to Aug 30, 2026 (1 day), the last altcoin season from Oct 2, 2025 to Oct 2, 2025 (1 day).
752 days since Oct 9, 2024 — that is how far our price history reaches for all coins involved.
Season Statistics
| Altcoin | Bitcoin | |
|---|---|---|
| Days since last season | 393 | 61 |
| Seasons in the period | 5 | 33 |
| Avg. days between seasons | 70 | 14 |
| Longest streak without a season | 277 | 102 |
| Avg. length of a season (days) | 5 | 7 |
| Longest season (days) | 10 | 76 |
| Total days in season | 26 | 238 |
Top Altcoins Over the Last 90 Days
Marked green: beat Bitcoin. Click through for the coin page with chart, risk and correlation figures.
| # | Coin | 90 days | vs Bitcoin |
|---|---|---|---|
| 1 | +214.0% | beats BTC | |
| 2 | +175.1% | beats BTC | |
| 3 | +156.7% | beats BTC | |
| 4 | +140.2% | beats BTC | |
| 5 | +136.4% | beats BTC | |
| 6 | +117.9% | beats BTC | |
| 7 | +106.7% | beats BTC | |
| 8 | +106.5% | beats BTC | |
| 9 | +97.3% | beats BTC | |
| 10 | +78.3% | beats BTC | |
| 11 | +75.3% | beats BTC | |
| 12 | +57.2% | beats BTC | |
| 13 | +56.9% | beats BTC | |
| 14 | +47.4% | beats BTC | |
| 15 | +42.5% | beats BTC | |
| 16 | +42.1% | beats BTC | |
| 17 | +41.3% | beats BTC | |
| 18 | +38.2% | beats BTC | |
| 19 | +36.4% | beats BTC | |
| 20 | +35.7% | beats BTC | |
| 21 | +34.0% | beats BTC | |
| 22 | +33.9% | beats BTC | |
| 23 | +32.5% | beats BTC | |
| 24 | +31.2% | beats BTC | |
| 25 | +26.8% | beats BTC | |
| 26 | +26.6% | beats BTC | |
| 27 | +25.6% | beats BTC | |
| 28 | +24.7% | beats BTC | |
| 29 | +24.1% | beats BTC | |
| 30 | +24.1% | beats BTC | |
| 31 | +22.5% | weaker | |
| 32 | +21.7% | weaker | |
| 33 | +20.9% | weaker | |
| 34 | +20.0% | weaker | |
| 35 | +18.5% | weaker | |
| 36 | +18.0% | weaker | |
| 37 | +14.2% | weaker | |
| 38 | +11.9% | weaker | |
| 39 | +11.1% | weaker | |
| 40 | +9.9% | weaker | |
| 41 | +9.5% | weaker | |
| 42 | +7.4% | weaker | |
| 43 | +4.7% | weaker | |
| 44 | +0.0% | weaker | |
| 45 | -0.2% | weaker | |
| 46 | -0.2% | weaker | |
| 47 | -3.6% | weaker | |
| 48 | -3.9% | weaker | |
| 49 | -8.9% | weaker | |
| 50 | -15.5% | weaker |
Method and Limitations
- Based on daily closing prices against the US dollar, comparing returns over 90 calendar days.
- Stablecoins are not excluded by a name list but detected by their price moving less than 2% over the period. Wrapped representations such as WBTC or stETH are excluded too — they track their underlying.
- Survivorship bias: The selection is based on today's market capitalization. We have no historical rankings, so the backward view omits coins that were large then and are small now.
- The history starts on Oct 9, 2024, because that is where our price data begins. All streak figures refer to those 752 days.
- The index is a breadth measure, not a buy or sell signal.




