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LITAltcoin Season Index
How many of the fifty largest coins are beating Bitcoin over ninety days: above 75 is altcoin season, below 25 is Bitcoin season. Computed here daily.
Loading Prices Binance USDT pairs Universe -- Updated --
Index, 90 days
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30 days
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7 days
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BTC, 90 days
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The bar every coin has to clear
Today's readingShare of the top 50 that outperformed Bitcoin over 90 days
--The index over timeRecomputed for every day the prices allow, on today's fifty
Altcoin season, 75 and over Bitcoin season, 25 and under Neither Bitcoin price, log scale
Breadth by horizonCoins beating Bitcoin
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Beating Bitcoin by most90 days, against BTC
Return over 90 days less Bitcoin's, in percentage points.
Trailing Bitcoin by most90 days, against BTC
The same measure, from the other end of the table.
The fiftyReturns in USD, and each against Bitcoin
| # | Coin | Price | 7d | 30d | 90d | vs BTC 90d | Beat BTC |
|---|---|---|---|---|---|---|---|
| Reading fifty daily series from Binance. | |||||||
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About this data
Updated Sep 2026Figures are shown as the source publishes them, and anything we calculate is explained below. How the data is made Report an error General information, not financial advice.
What the index measures
The Altcoin Season Index is a breadth measure. Take the fifty largest coins by market capitalisation, leave out stablecoins and wrapped or staked versions of other assets, and count how many of them returned more than Bitcoin over the last ninety days. The count, as a percentage, is the index. Seventy-five or more is altcoin season: three in four of the majors are beating Bitcoin. Twenty-five or less is Bitcoin season. The middle is neither.
It answers a narrower question than "are alts up". Alts can be up a great deal in a market where Bitcoin is up more, and that is not an altcoin season, it is a Bitcoin bull market with passengers. The index only rises when capital is rotating down the risk curve faster than it is rotating into Bitcoin.
How to read it
- The level is breadth, not size: An index of 80 means most majors are ahead of Bitcoin; it says nothing about by how much. The two lists above the table show the margins.
- The 30 and 7 day readings lead: Rotation shows up in the short horizons first. A 90 day index still in Bitcoin season while the 7 day reading is above 75 is what the start of a rotation looks like.
- The direction matters more than the level: An index rising through 50 has told you more than an index sitting at 70.
- Bitcoin's own return is the bar: The fourth print in the header is Bitcoin's 90 day return. When it is deeply negative, an index of 60 can mean alts fell less, not that they rose.
What it cannot tell you
- Survivorship: The history uses today's fifty. Coins that fell out of the top fifty since then are not in the line, which flatters altcoins in the back-history a little.
- Concentration: Fifty coins with equal weight treat a $2B token and a $200B one the same. That is the point of a breadth measure, and also its limit.
- Venue: Prices are Binance's. For a coin thinly traded there, the return can differ from its deepest market by a few points.
- Timing: Altcoin seasons historically arrive late in a cycle and end quickly. An index at 80 is a description of the last ninety days, not a promise about the next ninety.
Not investment advice
Breadth describes where the market has been rotating. It says nothing about whether the rotation continues. Nothing on this page is a recommendation to buy or sell anything.
Questions
Why does this differ from other altcoin season indexes?
Three reasons. The universe is read live and screened here, so the fifty can differ by a few names. Prices are Binance closes rather than a blended index. And the reading is computed at the moment you load the page rather than once a day, so it moves intraday.
Which coins are excluded?
Stablecoins, and tokens that are wrapped, staked or bridged versions of another asset, such as wrapped Bitcoin or staked Ether. Their return is another asset's return and would count it twice. Exchange tokens and layer ones are included.
What counts as altcoin season?
Seventy-five percent or more of the fifty beating Bitcoin over ninety days, the same threshold the original index uses. Twenty-five or less is Bitcoin season.
How often does it update?
On every page load, and every fifteen minutes while the tab is open. Daily closes only change at 00:00 UTC, but the current day's partial candle moves with the market.