The Altcoin Season Index is currently 77 — Altcoin Season as of September 20, 2026. It measures how much of crypto’s social attention is rotating into altcoins versus Bitcoin — the share of the top 50 tokens gaining social mindshare faster than Bitcoin. Above 75 is altcoin season; below 25 is Bitcoin season.
Updated hourly · Source: Nebula
A live, attention-based take on the classic altcoin season index — built from Nebula’s social mindshare data rather than slow 90-day price trends.
The classic index is built from 90-day price performance. Nebula’s is built from social mindshare — who is winning the crypto conversation right now — using LLM-scored analysis of every relevant post.
We look at the 50 largest tokens, excluding Bitcoin, stablecoins, and BTC/ETH wrappers, so the index reflects real altcoin attention rather than pegged assets.
Each altcoin’s change in social mindshare is compared to Bitcoin’s. The index is the share of those altcoins gaining attention faster than Bitcoin.
Because it reads attention rather than slow price trends, the index is a real-time gauge of rotation — refreshed every hour.
| Score | Signal | What it means |
|---|---|---|
| 0–25 | Bitcoin Season | Social attention is concentrated in Bitcoin; altcoins are largely being ignored. |
| 26–74 | Neutral / Mixed | No clear rotation — attention is split and the market is undecided. |
| 75–100 | Altcoin Season | Altcoins are capturing the majority of attention gains — the classic altseason signal. |
The top-50 altcoins with the strongest 24h gain in social mindshare — the tokens driving any rotation out of Bitcoin.
| Token | Mindshare | 24h mindshare | Price 24h |
|---|---|---|---|
 CCCanton | 0.05% | +680.5% | -6.0% |
 LEOLEO Token | 0.01% | +212.2% | +0.5% |
 GRAMGram (prev. Toncoin) | 0.03% | +134.1% | -1.0% |
 ENAEthena | 0.46% | +112.9% | +0.7% |
 BTWBitway | 0.03% | +95.1% | +26.2% |
 AVAXAvalanche | 0.91% | +91.1% | +11.4% |
 MMemeCore | 0.01% | +56.1% | +18.9% |
 CROCronos | 0.09% | +47.4% | -2.4% |
 ONDOOndo | 0.46% | +35.1% | -3.7% |
 XRPXRP | 3.14% | +33.7% | -4.1% |
 OKBOKB | 0.03% | +30.1% | -4.1% |
 PUMPPump.fun | 0.47% | +23.8% | -3.0% |
See mindshare, sentiment and Fear & Greed for any of 100,000+ tokens.
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