Altcoin Season Index
What percentage of the top 50 altcoins are outperforming? Bitcoin Over the past 90 days. One glance reveals the crypto market's current capital rotation phase.
How to read the Altcoin Season Index
The index shows what percentage of the top 50 altcoins by open interest outperformed Bitcoin Based on returns over the past 90 days. Stablecoins (USDT/USDC) and wrapped tokens (WBTC/WETH) are excluded because they track other assets and do not reflect the independent performance of altcoins. The calculation is based on the actual prices of perps on Binance USDT-margined — no third-party APIs.
Scale 0–100. Above 75 is officially “altcoin season”: capital rotation from BTC in altcoins, meme coins, and L1 tokens are accelerating by tens and hundreds of percent. Below 25 is "season" Bitcoin»: alts merge, dominance BTC The market is growing, hiding in quality. Between 25 and 75 is a transition zone: neither side dominates, and the choice of strategy depends on the specific coin, not the overall trend.
Historically, distinct alt-seasons occur once or twice per cycle and last 2-4 months. For example, January-April 2021 and February-March 2024. Between these periods, the market spends most of its time in the "BTC bias" or "neutral" phase. Therefore, 90% of attempts to "catch an alt-season in the middle of a bull market" fail: it's easier to wait for clear confirmation (index > 75 for several weeks in a row) than to try to enter early.
Setups for the alt-season
Altcoin season
Capital is rotated from BTC in altos. Big L1 (SOL, AVAX, SUI) and meme coins are performing better. It's time for active trading of alts with leverage. However, an index above 90 consistently for several weeks often marks a local peak. Prepare for a correction.
Season Bitcoin
The altos merge, BTC-dominance is growing. In this phase, long-term alt holds lose value relative to BTCStrategy - go to cash or BTC-only positions. Opening long positions on altcoins is almost always counter-trend.
Neutral phase
A market with no clear trend between BTC and alts. This is where stock picking for specific coins comes into play, rather than a general strategy. This is a good time for swing trades on individual coins with strong narratives or news.
BTC bias
BTC Outperforms most alts, but not by a huge margin. The classic "build-up" phase before alt season: BTC It's growing, and the alts are catching up with a lag. You can start gaining positions in the major alts gradually.
Related indicators
Capital rotation analysis on a chart
IN SuperChart Compare the chart of any altcoin with BTCBuild relative strength and see how capital rotation changes between major assets in real time.
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