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Altcoin Season Index: is it bitcoin's market or the altcoins'?

A new public page at https://tradersweek.com/crypto/altcoin-season-index measures how many of the 50 largest altcoins beat bitcoin over the last 90 days — 25 or below is Bitcoin Season, 75 or above is Altcoin Season — with stablecoins and wrapped tokens filtered out.

Altcoin Season Index

One number for a common question

Take the 50 largest coins by market cap, leave out bitcoin, and count how many did better than bitcoin over the last 90 days. That share, from 0 to 100, is the Altcoin Season Index. At 25 or below it is Bitcoin Season; at 75 or above, Altcoin Season; in between, neutral.

Only real altcoins

A stablecoin or a wrapped bitcoin can't 'beat bitcoin' in any meaningful sense, so they would only skew the count. We filter out stablecoins, wrapped and bridged tokens, liquid-staking and restaking tokens, tokenized gold and other tokenized products by category, so a newly launched stablecoin drops out on its own. If fewer than 25 coins have a full 90-day history, the index is not published that hour.

What the page shows

  • Today's value and season, recalculated every hour.
  • A one-year chart; the earliest days are reconstructed from today's top 50 and marked as such.
  • A table of all 50 coins and their 90-day performance against bitcoin, and the method.

See it at /crypto/altcoin-season-index, next to the Fear & Greed Index.

Not investment advice. The index describes past relative performance and does not predict which coins will outperform.