TLDR
The Altcoin Season Index has fallen sharply to the low 20s, signaling a Bitcoin?led market rather than broad altcoin outperformance, with reports citing readings near 22 out of 100 this week Altcoin Season Index at 22.
- It was near 78 on 20 Sep, so momentum flipped meaningfully since then prior high 78.
- A reading in the low 20s suggests most top 100 coins lag BTC over the last 90 days 22 out of 100.
- Altcoin season typically requires 75 or higher, with the last decisive instance on 4 Dec 2024 at 87 %%CKPROTECTED0%%.
Deep Dive
1. Where It Is Now
Readings around 21 to 23 indicate Bitcoin Season, meaning only about a fifth of top 100 assets have outperformed BTC over the past 90 days index at 22. The index tracks relative performance to Bitcoin across a 90?day window, so a low score reflects narrow breadth and risk preference for BTC over altcoins definition note.
Until breadth improves, most altcoins could struggle to sustain rallies without a BTC dominance rollover.
2. What Changed Since September
The index fell from a high near 78 on 20 Sep to the low 20s, showing a decisive rotation back toward BTC leadership 78 to 22 shift. Coverage this week continues to characterize conditions as Bitcoin?led, with the index cited at 22 and commentary highlighting a reluctance to rotate into higher?risk altcoins Bitcoin Season note. Other market updates also point to BTC capturing the majority of inflows during rebounds, consistent with a low index reading BTC?led inflows context.
The near?term setup favors BTC strength over broad altcoin momentum. Isolated alt pops may occur, but the tape is not yet supportive of a sector?wide run.
3. What Would Mark Altseason Again
Historically, readings above 75 indicate an altcoin season, with the last strong signal on 4 Dec 2024 at 87 %%CKPROTECTED0%%. Signs to watch include a sustained index rise toward 60 to 75, improving market breadth, and capital rotation out of BTC into altcoins as documented by the index and flow snapshots index at 22 today.
For an altseason call, monitor the index pushing above 75 along with breadth and volume expansion across multiple alt categories.
Conclusion
The Altcoin Season Indexs drop to the low 20s confirms a Bitcoin?led regime. A durable altseason likely needs a broadening of performance and an index move back toward 75 or higher, supported by visible rotation and improving breadth. Until then, expect BTC relative strength to dominate most cross?asset comparisons.
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