Market structure signal · Bitcoin cycle
Altcoin Season Index
Whether the broad altcoin market is beating Bitcoin — the risk-on / risk-off tell.
Soon
Coming soon
Deferred — needs broad multi-coin data we can’t self-source from a free feed yet.
Not yet in the index
What is the Altcoin Season Index?
The Altcoin Season Index measures what share of the top altcoins have outperformed Bitcoin over the last 90 days, on a 0–100 scale.
High readings (“altseason”) mean broad alt outperformance; low readings (“Bitcoin season”) mean money favours Bitcoin. Like dominance, it needs broad multi-coin data, so it is deferred until we have a free source.
Coming soon — defined here for reference but not yet part of the index. It will be added once a free, independent data source is wired in.
How to read it
There's no magic threshold, but history gives rough bands. Think of these as context, not triggers.
| Zone | Reading | What it has meant historically |
|---|---|---|
| Bitcoin season | below ~25 | Money favours BTC; risk-off. |
| Mixed | ~25 – 75 | No clear leadership. |
| Altseason | above ~75 | Broad alt outperformance; late-cycle. |
It's a signal about months and cycles, not days. That's why CryptoMarketCycle blends it with the other signals rather than reading it alone.
Common questions
Altcoin season is when most major altcoins outperform Bitcoin over a sustained window — the index scores that from 0 to 100.
It needs broad data across many coins. We only use free, self-owned sources, so it is deferred until we have one — then it joins the median automatically.
Related signals
Altcoin Season Index is a coming-soon signal — not yet part of the 14-signal Crypto Market Cycle Index.
See the full index →