Is It Altcoin Season Right Now?
The Altcoin Season Index is 54: 27 of 50 tracked altcoins beat Bitcoin over the trailing 90 days.
When most large altcoins outrun Bitcoin for weeks, capital is rotating down the risk curve: that is altseason. This index measures it directly: the share of the top 50 Binance perpetual altcoins whose trailing 90-day return beats BTC's. 75 or higher is altseason, 25 or lower is Bitcoin season. We record the reading daily, so the history on this page is measured, not reconstructed.
Who is actually winning the rotation?
The live reading with the strongest and weakest large alts against BTC over the window. A high index with narrow leadership is a different market than a high index with broad participation.
The recorded history
One reading per UTC day, recorded as it happened. We started recording on 2026-07-30; the chart grows a point every day and is never backfilled from a reconstruction.
Why so short? Rebuilding past readings with today's coin universe would quietly rewrite history (survivorship bias), so we record forward instead. History, as measured.
What happened after days like this?
Every recorded day is grouped by where this metric sat; each band shows the median BTC move that followed. Distribution, not prediction.
Today sits in the "Very low" band of the recorded history so far. Not enough history in this band yet for an honest read (n=19, we show nothing below 30).
| Band | Range | Days | Next 24h | Next 72h | Next 7d | Up next 7d |
|---|---|---|---|---|---|---|
| Very lowtoday | 46 … 56 | 19 | not enough history (n<30) | |||
| Low | 56 … 62 | 23 | not enough history (n<30) | |||
| Mid | 62 … 67 | 18 | not enough history (n<30) | |||
| High | 67 … 74 | 20 | not enough history (n<30) | |||
| Very high | 74 … 84 | 21 | not enough history (n<30) | |||
| All days (base rate) | 101 | +0.0% | -0.2% | -0.7% | 42% | |
Median BTC move after each band. Records since 2026-07-30 (108 days). History, not a forecast.
Methodology and honest limits
Universe: the top 50 Binance USDT-M perpetual altcoins by 7-day median daily quote volume, excluding stablecoins, gold tokens and index products. The 80 most traded contracts of the day are the candidates and a contract needs five completed days, so one day's volume spike or lull no longer rotates a coin in or out. This is a stated, honest proxy for the market-cap universes other trackers use; actively traded coins dominate it.
Score: for each alt, the trailing 90-day return from daily closes is compared with BTC's. The index is the percentage of alts that beat BTC. Coins listed less than 120 days ago are excluded (a coin must have traded for 30 days before the window opens) so fresh listings and listing-day prices cannot skew the share.
Recording: the live value refreshes every 6 hours; one reading per UTC day is written to our permanent metric archive. Once at least 30 days exist, the same conditional-distribution table we publish for every metric appears here.
Limits: the index says nothing about direction, only breadth of rotation. A falling market can print a high index if alts fall less than BTC.
FAQ
What counts as altseason?
A reading of 75 or higher: three quarters of the tracked large altcoins are outperforming Bitcoin over the trailing 90 days. 25 or lower is the mirror image, Bitcoin season.
Why does your number differ from other altseason trackers?
Universe and window choices differ. Ours is the top 50 Binance perpetual altcoins by 7-day median volume against a 90-day window, stated openly. The regime read usually agrees across trackers even when the exact number differs.
How is this different from BTC dominance?
Dominance tracks where the market cap sits; the season index tracks how many alts are actually winning. Falling dominance plus a rising season index is the classic altseason confirmation; either alone is often noise.
Why does the recorded history start in 2026?
Because we refuse to reconstruct it. Backfilling with today's coin list would inject survivorship bias, so the chart only contains readings recorded on the day they happened.
Source: ByKaranteli, https://bykaranteli.com/altseason, data as of 2026-11-15 15:12 UTC