Altcoin Season Index

It measures the share of the top-50 coins (stablecoins excluded) outperforming Bitcoin over the trailing 90 days, scaled 0-100. Above 75 = Altseason; below 25 = Bitcoin Season.

Altseason typically follows major BTC rallies as capital rotates outward. A fast rise from low levels signals expanding altcoin beta; extremes warn the rotation may be exhausting. Zone judgments are based on this site's own model and may differ from definitions used elsewhere; for reference only.