Market breadth, measured against Bitcoin
Altcoin Season Index
The percentage of leading altcoins outperforming Bitcoin. A score above 75 signals broad altcoin leadership.
90-day score
56
/ 100
Transition Zone
Leadership is mixed and market breadth has not reached either extreme.
Snapshot recorded
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Index History
Historical snapshots accumulate daily from this deployment.
View recent values as a table
| Date | Index value |
|---|---|
| Oct 5, 2026 | 70 |
| Oct 6, 2026 | 73 |
| Oct 7, 2026 | 71 |
| Oct 8, 2026 | 68 |
| Oct 9, 2026 | 56 |
| Oct 10, 2026 | 59 |
| Oct 11, 2026 | 73 |
| Oct 12, 2026 | 68 |
| Oct 13, 2026 | 59 |
| Oct 14, 2026 | 56 |
| Oct 15, 2026 | 68 |
| Oct 16, 2026 | 56 |
30-day relative strength
Leading Bitcoin Outperformers
QuantQNT · Rank #38
+213.92% vs BTC
BitwayBTW · Rank #36
+148.72% vs BTC
NEAR ProtocolNEAR · Rank #20
+105.39% vs BTC
SuiSUI · Rank #28
+38.79% vs BTC
EthenaENA · Rank #41
+33.48% vs BTC
OndoONDO · Rank #47
+31.15% vs BTC
WorldcoinWLD · Rank #52
+27.22% vs BTC
AvalancheAVAX · Rank #27
+27.16% vs BTC
What the index says today
On October 16, 2026 the Altcoin Season Index reads 56/100 on its 90-day window: 56% of the 50 tracked altcoins have outperformed Bitcoin over that period. That places the market in the transition zone. Leadership is mixed and market breadth has not reached either extreme.
Compared with earlier readings, the index is unchanged from a week ago (56), up 27 points from a month ago (29), up 3 points from three months ago (53).
Since July 14, 2026 it has ranged from 24 (August 31, 2026) to 78 (September 27, 2026). It last reached the altcoin season threshold of 75 on September 27, 2026.
The shorter and longer windows tell you whether a move is new or established: the 7-day index is 34, the 30-day 64, the 90-day 56 and the one-year 31. Short-term breadth is weaker than the monthly read, a sign the rotation is fading.
The index counts the 50 largest altcoins by market capitalisation, excluding stablecoins, tokenised funds and wrapped or staked versions of other assets, and asks what share beat Bitcoin. 75 or more is the altcoin season zone, 25 or less is Bitcoin season, and the range between is a transition. A confirmed altcoin season also needs Bitcoin dominance at 42% or less; it is 59.3% on the same date.
How these figures are calculatedAltcoin Season Index questions
- What is the Altcoin Season Index today?
- The Altcoin Season Index is 56/100 on October 16, 2026, using the 90-day window: 56% of the 50 tracked altcoins outperformed Bitcoin. That is the transition zone.
- Is it altcoin season right now?
- No. The index is 56, below the altcoin season threshold of 75, and Bitcoin dominance is 59.3%. A confirmed altcoin season needs the index at 75 or more with dominance at 42% or less.
- When did the index last reach the altcoin season zone?
- The index last reached 75 or more on September 27, 2026. Bitcoin dominance was 58.3% that day, above the 42% a confirmed season needs, so it was a threshold reading and not a confirmed altcoin season.
- When was the last Bitcoin season?
- The index last fell to 25 or below, the Bitcoin season zone, on September 2, 2026.
- How is the Altcoin Season Index calculated?
- It takes the 50 largest altcoins by market cap, excluding stablecoins, tokenised funds and wrapped or staked assets, and measures the share whose return beat Bitcoin's over the window. A score of 60 means 60% of them outperformed Bitcoin.
- What is the difference between the 30-day and 90-day index?
- The 30-day index reacts quickly and can flip on a single strong month; the 90-day index needs a sustained rotation and is the headline signal here. Today they read 64 and 56.
No mystery score
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