Altcoin Season Radar

% of top-50 altcoins outperforming BTC over 30 days

What is the Altcoin Season Radar?

The Altcoin Season Radar measures what share of the top-50 altcoins (excluding stablecoins and wrapped assets) outperformed Bitcoin over the past 30 days. Above 75% is conventionally an "altcoin season"; below 25% a "Bitcoin season".

How do I use the Altcoin Season Radar?

A fast rise from low levels usually signals capital rotating from BTC into alts; a sustained high reading suggests the alt rally is late-stage and risk is building. Use it to set your BTC-vs-alt portfolio weighting, not to pick individual coins.

What should I watch out for?

The 30-day window lags violent moves, and the outperformance ratio ignores magnitude — fifty alts beating BTC by 1% reads the same as five alts doubling. Cross-check with the top movers and volume data.

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