Altcoin Season Index

Every cycle has a moment when Bitcoin goes quiet and suddenly your group chats are full of coins you’ve never heard of doing 40% in a day. That moment has a name — altseason — and the index above tells you whether you’re actually in one or just watching three lucky tokens make noise.

The measurement is refreshingly blunt: take the top 50 coins by market cap, strip out stablecoins and wrapped assets, and count how many have beaten Bitcoin over the last 90 days. If 75% or more outperformed BTC, it’s officially altcoin season. If 25% or fewer managed it, Bitcoin season is in charge. Everything between is no-man’s-land.

Why the fuss? Because the difference between holding alts in altseason and holding them in Bitcoin season is the difference between compounding and donating. This page keeps the score live so you know which game the market is playing before you place your bet.

The Methodology, Without the Mystery

Unlike sentiment gauges that blend a dozen fuzzy inputs, the Altcoin Season Index is pure arithmetic:

1. Take the top 50 cryptocurrencies by market capitalisation.
2. Exclude stablecoins (USDT, USDC and friends) and wrapped or pegged assets like WBTC — they track other things and would pollute the sample.
3. Measure each coin’s performance against Bitcoin over a rolling 90-day window.
4. Count the outperformers and express them as a percentage.

The thresholds give the index its teeth:

The 90-day lookback is deliberate. A one-week alt pump doesn’t qualify — the index demands sustained, broad outperformance, which filters out the head-fakes that trap impatient traders.

Why Rotation Timing Is the Whole Game

Crypto returns are brutally regime-dependent. The same portfolio of ten large-cap alts can triple during a genuine altseason and get cut in half during Bitcoin season — with the exact same coins, the same team activity, the same roadmaps. What changed wasn’t the projects; it was the regime.

This is why professionals obsess over rotation. The classic capital flow works in stages: new money enters Bitcoin first, because it’s the most trusted door into the market. Once BTC has run and cooled, profits look for higher beta — first Ethereum and large caps, then mid caps, then the truly speculative end of the pool. The Altcoin Season Index is essentially a speedometer for that spillover.

The practical implication is uncomfortable but freeing: your coin-picking matters less than your regime-reading. A mediocre alt in altseason often beats a brilliant alt in Bitcoin season. Traders who accept this stop asking “which coin?” first and start asking “which season?” — then choose coins only after the environment supports the trade. Our profit calculator is useful here for stress-testing what a position looks like under both regimes before you commit.

What Altseason Actually Looks Like From Inside

If you’ve never traded through one, real altseason has a recognisable texture:

• Bitcoin goes sideways or grinds slowly while alt charts go vertical. BTC boredom is usually the precondition, not the obstacle.
• Rotation moves down the quality ladder. ETH leads, then established large caps, then mid caps, and finally coins whose whitepapers nobody has read. By the time the bottom of the barrel is pumping, the season is usually old.
• Everything correlates upward. In deep altseason, even weak projects rise — which fools holders into thinking their bags pumped on merit.
• It ends faster than it began. Alt drawdowns after the music stops are historically savage — 70–90% retraces from peak are normal, not exceptional. The 2017–2018 and 2021–2022 aftermaths both made that point emphatically.

The index reading through these phases climbs steadily, pins near the top during the frenzy, then rolls over — often before prices fully do, as breadth narrows while the loudest coins keep pumping. That divergence between a falling index and still-green headlines is one of the most valuable warnings this tool produces.

Pairing the Index With Bitcoin Dominance

The Altcoin Season Index and Bitcoin Dominance measure related but different things — breadth versus market share — and their disagreements are as informative as their agreements:

• Index high + dominance falling: textbook altseason. Broad outperformance backed by an actual shift in capital share. The strongest configuration.
• Index high + dominance flat: alts are winning on percentage terms but not pulling real market share — often a smaller, more fragile rotation.
• Index low + dominance rising: full Bitcoin season. Fighting this regime with alt bags has punished traders in every cycle.
• Index climbing from Bitcoin-season lows: the early-rotation zone many traders consider the best risk-reward window — alts still cheap against BTC, breadth quietly improving.

Add the Fear & Greed Index as a third witness: altseason readings alongside extreme greed have historically clustered near cycle tops, while Bitcoin season plus extreme fear marks the wastelands where future outperformers get accumulated cheaply.

The Nigerian Reality: Liquidity Is Your First Risk

Trading altseason from Nigeria adds a layer the global commentary never mentions: exit liquidity in naira. A top-50 coin might have deep books on international exchanges, but the moment you want to cash out through P2P, you discover the real market for your token locally can be a handful of merchants and a WhatsApp group.

Practical realities to price in:

• Most naira P2P volume lives in USDT. The standard exit route is alt → USDT → naira. That’s two spreads, two sets of fees, and two moments where slippage bites. On a small alt during a volatile day, the round trip can quietly eat a chunk of your paper gains.
• Listings lag. Local platforms and P2P merchants adopt trending alts late. If your coin isn’t widely supported, converting size takes time — and altseason profits have a short shelf life.
• Premiums swing with sentiment. When the whole market rushes to exit at once, naira-side rates move against you precisely when you need them most.

The disciplined move is to plan the full journey to naira before entering, and sanity-check values with our converter rather than trusting screenshot prices from Telegram.

Chasing Green Candles: A Warning Label

The index exists to inform rotation — but in practice, many people discover it only after alts have already pumped, then use the high reading as permission to chase. Some honesty about how that ends:

• A high reading is a description, not a promise. By the time the index prints 80+, much of the move it describes has already happened. You’re reading yesterday’s scoreboard, not tomorrow’s fixture list.
• Breadth peaks before prices. Late altseason narrows to fewer and fewer winners while losers quietly roll over. Buying random alts at that stage is buying the losers statistically.
• Leverage plus altseason is a graveyard. Alt volatility in both directions is extreme; funding rates during manias make longs expensive to hold; and the reversals arrive without appointment.
• Nobody rings a bell at the top. The index rolling over from extreme readings is the closest thing to one — respect it even when your portfolio is still green.

Rules beat vibes. Decide before the season starts what reading makes you rotate in, what makes you take profit, and what makes you retreat to BTC or USDT — then obey your own instructions.

How Our Widget Computes the Live Score

The value at the top of this page isn’t scraped from a screenshot — it’s computed from live market data. Our system pulls current and 90-day-ago prices for the top 50 coins by market cap, filters out stablecoins and wrapped assets, benchmarks each remaining coin’s 90-day return against Bitcoin’s, and counts the outperformers. That count, as a percentage, is the score you see, refreshed on a regular schedule throughout the day.

Two caveats we’d rather state than hide:

• Composition drifts. The top-50 list changes as coins rise and fall in rank, so the index compares slightly different baskets over time. That’s inherent to the methodology everywhere it’s implemented, not unique to us.
• Thresholds are conventions. The 75/25 lines are sensible, widely used cut-offs — not laws of nature. Treat readings near the boundaries as transitions, not switches.

Used with the humility it deserves, this index answers one question better than anything else: is the alt trade broad and real right now, or is it three coins and a lot of noise?

Frequently asked questions

Pair it with

• Bitcoin Dominance — the macro view of the same rotation.
• Profit calculator — because altseason gains only count after fees.
• Fear & Greed Index — altseason plus extreme greed is historically where tops live.