Alt Season Index

The Alt Season Index is a market indicator that measures whether altcoins (cryptocurrencies other than Bitcoin) are outperforming Bitcoin over a defined period.

Alt Season Index 

The Alt Season Index is a market indicator that measures whether altcoins (cryptocurrencies other than Bitcoin) are outperforming Bitcoin over a defined period. Created by BlockchainCenter.net, the index helps traders identify when the crypto market is shifting away from Bitcoin dominance toward a broader “alt season,” where alternative coins see accelerated growth.

How the Alt Season Index Is Calculated

The index evaluates the performance of the top 50 altcoins (excluding stablecoins) against Bitcoin over the past 90 days. If at least 75% of these altcoins outperform Bitcoin, the market is considered to be in an Alt Season.

  • Altcoin performance is measured in percentage price gain versus BTC.
  • A score from 0 to 100 is assigned, where:
    • 0–24 = Bitcoin Season
    • 25–49 = Mixed/Transitional Market
    • 50–100 = Altcoin Season (especially if 75%+ are outperforming BTC)
       

 How Investors Use the Alt Season Index

  • Trend Confirmation: Investors use the index to time portfolio rotations from BTC to high-potential altcoins during early Alt Season signals.
  • Risk Management: A rising Alt Season Index often suggests increased market risk and volatility, prompting rebalancing or caution.
  • Market Sentiment Gauge: The index provides a snapshot of broader investor appetite for risk-on assets in the crypto space.

It’s particularly useful for swing traders, altcoin speculators, and portfolio managers who adjust exposure based on sector dominance trends.

Summary

The Alt Season Index is a data-driven tool that tracks whether altcoins are outperforming Bitcoin, helping investors identify market cycles and optimize timing for altcoin exposure. By highlighting shifts in capital flow, it serves as a key sentiment and rotation indicator in the crypto ecosystem.