Altcoin Season Indicators: A Data-First Trader Checklist

Last Updated: November 2, 2026

You can check whether altcoin season conditions are met in under a minute. The Altcoin Season Index treats a reading of 75 or more as confirmation that at least 75% of the largest coins, excluding stablecoins and wrapped tokens, have outperformed Bitcoin over the previous 90 days. That threshold is the most widely cited operational definition of altseason. On November 2, 2026, the checklist below came out negative: CoinMarketCap’s index read 47 and Blockchaincenter’s 39, Bitcoin dominance was near 60% and ETH/BTC was falling, so it is not altcoin season.

Here is the 60-second checklist:

• Altcoin Season Index high enough? Check CoinMarketCap (top 100 coins) or Blockchaincenter (top 50 coins) for the latest reading. Anything below 75 means a neutral or Bitcoin-led market, and 25 or less means Bitcoin season.
• Bitcoin dominance rolling over? A sustained decline from a local peak is the signal traders cite most often for capital rotating into altcoins. A flat or rising dominance line means the rotation has not started.
• ETH/BTC trending up? A rising ETH/BTC ratio has usually come before the broader rotation. If Ether is already outperforming Bitcoin, the market is pricing in risk appetite before smaller caps follow.

Pro Tip: The Altcoin Season Index is a lagging confirmation, not a trigger. In 2025, ETH/BTC peaked on August 24, and Blockchaincenter’s index crossed 75 only on September 11, 18 days later. Use the index to confirm a regime, not to time an entry.

Key Takeaways

The most reliable altcoin season signal is the convergence of falling Bitcoin dominance, rising ETH/BTC and expanding altcoin breadth, confirmed but not triggered by an Altcoin Season Index reading of 75 or more.

Table of Contents

• Where altcoin season indicators stand in November 2026
• What the Altcoin Season Index actually measures
• Core altcoin season indicators every trader should track
• How to combine these signals into a timing framework
• Where to watch altcoin season indicators live
• How long altseasons last and what kills them early
• How to read historical altseason charts and methodology differences
• How macro events and regulatory news affect altseason signals
• A pragmatic view on using these indicators in 2026
• Frequently Asked Questions
• Sources

Where altcoin season indicators stand in November 2026

Run through the checklist with the readings from November 2, 2026, and none of the three main conditions is met.

Sources: CoinMarketCap and Blockchaincenter at about 18:00 UTC, Alternative.me on November 2, 2026. ETH/BTC and its 50-day average are our calculation from CoinMarketCap prices and daily closes.

CoinMarketCap’s index has slipped from this year’s high of 64 on September 27 as most altcoins fell harder than Bitcoin through October, including after the October 29 Binance hack. CoinGlass, which publishes its own version built on a broader set of factors, showed 50 on the evening of November 2. For CoinMarketCap’s index to reach 75, about 74 of its 99 coins would have to beat Bitcoin over 90 days, 27 more than today. The last altcoin season ended in September 2025; our Altcoin Season Index page tracks the daily readings and the full history.

What the Altcoin Season Index actually measures

The index counts how many coins in a defined universe, the top 50 on Blockchaincenter and the top 100 on CoinMarketCap, have outperformed Bitcoin over a rolling 90-day window. That count is converted to a score from 0 to 100. It does not compare market capitalizations, and every coin counts equally.

Score ranges used by both providers:

What gets excluded matters. Both CoinMarketCap and Blockchaincenter strip out stablecoins such as Tether and DAI and asset-backed or wrapped tokens such as WBTC and stETH, because their prices are pegged or mechanically tied to another asset. Including them would dilute the signal. Both count Ethereum as an altcoin. The different universes, top 50 versus top 100, change sensitivity: a top-100 index picks up small-cap moves that a top-50 index misses, which can make it more reactive but also noisier.

A quick numeric example from November 2, 2026: 47 of the 99 coins CoinMarketCap compares beat Bitcoin over 90 days, so its index read 47. On Blockchaincenter, 19 of 49 altcoins did, a reading of 39. On CoinMarketCap’s data, Bitcoin itself gained about 20% over that window, so altcoins had to rise even faster to count.

The 90-day lookback is also the index’s main weakness. Because the window looks backward, the index can cross 75 well after the sharpest gains have already occurred, and old moves dropping out of the window can shift the reading on a quiet day. Treat it as a regime confirmation, not a predictive signal.

Core altcoin season indicators every trader should track

1. Bitcoin dominance

Bitcoin dominance measures Bitcoin’s share of total crypto market cap. A steady decline from a local peak is the most widely watched leading regime signal, because it shows capital flowing out of Bitcoin and into altcoins. Before the September 2025 altcoin season, dominance fell from about 65% in late June to about 57% in mid-September. Watch for a confirmed rollover, not a single-day dip. Our Bitcoin dominance page follows the current level and its history.

2. ETH/BTC ratio

The ETH/BTC pair has typically moved before smaller altcoins. When Ethereum starts outperforming Bitcoin, it signals that the market is pricing in broader risk appetite. In 2025, ETH/BTC rose about 90% from a low of about 0.0221 on June 22 to about 0.0421 on August 24 (CoinMarketCap daily closes), weeks before the altcoin season began. A break above the 50-day moving average on the ETH/BTC chart is a commonly used marker of early rotation. Think of it as the canary: if ETH/BTC is flat or falling, as it was in late October 2026, the rotation thesis is weak regardless of what the index says.

Pro Tip: Watch ETH/BTC on a weekly chart alongside the daily. A weekly uptrend that aligns with a daily moving average break is a stronger signal than a daily spike alone.

3. Market breadth

A genuine altseason is breadth-driven. A handful of memecoins pumping does not qualify unless most large- and mid-cap altcoins show sustained outperformance against Bitcoin. Track the share of the top 50 or top 100 beating Bitcoin on a rolling basis; that share is exactly what the Altcoin Season Index measures. Narrow breadth, where gains concentrate in one sector, suggests a thematic pump rather than a true regime shift. In the 90 days to November 2, 2026, Quant gained more than 230% while 21 of the top 100 coins fell, according to CoinMarketCap.

Memecoin moves can also reverse sharply on a single transfer, as in October 2024, when an 810 million token deposit to Binance and OKX triggered an 11% drop.

4. Volume and liquidity signals

Rising altcoin spot volume across major exchanges is a necessary condition, not a sufficient one. Traders pair it with changes in altcoin perpetual open interest and watch stablecoin balances on exchanges: rising stablecoin reserves suggest dry powder waiting to rotate, while falling stablecoin balances alongside rising altcoin volume suggest capital is being deployed.

5. Perpetual funding rates

Sustained positive funding rates on altcoin perpetuals mean longs are paying shorts to keep positions open. Moderate positive funding is common in early and middle stages of a rally but becomes a warning sign when rates spike sharply. Funding rate spikes often come before fast reversals because they indicate the market is over-leveraged on the long side.

6. On-chain activity

Active addresses and transaction counts rising on a specific chain are early confirmation that real usage, not only speculation, is driving price. Token unlock schedules matter in the other direction: a large scheduled unlock can weigh on a coin’s price even during a broad altseason. Check on-chain data for large wallet transfers, which sometimes come before exchange listings or unlock events. Our emerging altcoins radar covers upcoming unlocks and listings.

7. Social sentiment and narrative rotation

Search volume spikes, social engagement on X (formerly Twitter) and Reddit activity around specific altcoin narratives can come before price moves by days. The limit is that sentiment is a notoriously noisy standalone signal. It is most useful for spotting which sectors are gaining narrative momentum, not as a buy trigger on its own. The crypto fear and greed index adds a market-wide reading; it stood at 37, Fear, on November 2, 2026.

How to combine these signals into a timing framework

The strongest framework pairs a set of leading signals with a lagging confirmation. When altcoins rise against Bitcoin and Bitcoin dominance falls together, that convergence produces the most reliable regime signal. When they diverge, selectivity matters more than broad exposure. The approaches below describe common practice, not recommendations.

Confirmations traders commonly look for before calling a broad altcoin season:

1. Bitcoin dominance rolling over from a local high, confirmed on the weekly chart rather than intraday.
2. ETH/BTC trending up and holding above its 50-day moving average.
3. Altcoin breadth expanding: more than half of the top 50 beating Bitcoin over 30 days, which Blockchaincenter’s 30-day index shows directly (it read 22 on November 2, 2026).
4. Spot volume rising on altcoins without a matching spike in funding rates, an early-stage sign.
5. The Altcoin Season Index above 50 and trending toward 75, approaching confirmation but not yet confirmed.

Early versus confirmed signals:

• Acting on leading signals: some traders move when dominance rolls over and ETH/BTC breaks out, before the index reaches 75. This catches more of a move but carries a higher risk of a false start.
• Waiting for confirmation: others wait for the index to cross 75. This gives more confidence that the regime is real, but much of the move may already be over, and some seasons last only days.

How exposure is often adjusted by stage:

• Early stage: traders who act early tend to keep positions small and focus on large-cap altcoins such as ETH, SOL and established layer-1s.
• Middle stage: exposure is often widened as breadth confirms, spread across sectors with genuine volume.
• Late stage: many traders scale back as funding rates spike and social sentiment turns extreme, treating these as late-cycle warnings rather than reasons to add.

Signals commonly read as the end of a season:

• Bitcoin dominance bottoming and turning up.
• ETH/BTC rolling over below its 50-day moving average.
• Altcoin perpetual funding rates spiking sharply across many assets at once.
• The Crypto Fear and Greed Index reaching extreme greed while breadth starts narrowing.

What the signals looked like in the 2025 altcoin season:

• Late June 2025: Bitcoin dominance near 65% and ETH/BTC near 0.022, its low for the year.
• July and August: ETH/BTC rose about 90% to about 0.0421 on August 24 as dominance fell.
• September 11: Blockchaincenter’s index crossed 75, with dominance near 57%; it peaked at 80 and stayed at 75 or above until September 21. CoinMarketCap’s index reached 75 only from September 18 to 20, peaking at 78.
• Late September and October: ETH/BTC was about 8% below its August high on September 21 and about 19% below it on October 10, when CoinMarketCap’s index was down to 35.

The leading signals turned weeks before the index confirmed the season, and the confirmation lasted less than two weeks.

Where to watch altcoin season indicators live

The right dashboard depends on which signal you are tracking. Here is what each source does best:

• Blockchaincenter Altcoin Season Index: free, updated daily, with the 90-day score, 30-day and 365-day versions, a calendar coloring every day since 2017 by season and statistics on past seasons. The original and most widely cited version of the index.
• CoinMarketCap Altcoin Season Index: free, refreshed daily, based on the top 100 coins. It shows yesterday’s, last week’s and last month’s readings, the yearly high and low, the 90-day performance of each coin and an altcoin market cap chart.
• CoinGlass Altcoin Season Index: free, with its own index reading next to CoinGlass’s funding rate, open interest and liquidation data. Useful for cross-referencing leverage data with the breadth picture; its method weighs more factors than a simple 90-day count.
• TradingView: free and paid tiers. Best for charting ETH/BTC, Bitcoin dominance (ticker BTC.D), TOTAL2 and OTHERS, and for setting alerts on moving average crossovers.
• Blockchainreporter crypto market coverage: free and updated daily. Covers dominance moves, ETH price action and rotation narratives as they develop.

Common alert setups that avoid noise:

• A Bitcoin dominance alert at a meaningful level, such as the 2026 high near 60.6% or the September 2025 low near 57%, rather than on every 0.1% move.
• On TradingView, an ETH/BTC 50-day moving average crossover as the alert condition instead of a fixed price level.
• For the Altcoin Season Index, a threshold alert at 70 gives a heads-up before the conventional 75 confirmation.

Pro Tip: Macro data releases, particularly CPI prints and Fed decisions, can briefly distort dominance and altcoin volume readings. Moves on those days can look like rotation and then reverse, so some traders leave event days out when reviewing their signals.

How long altseasons last and what kills them early

Most altseasons are short. Blockchaincenter’s daily 90-day index has recorded 25 altcoin seasons since 2017, lasting from 1 to 117 days, about 17 days on average, and half of them lasted four days or less. Only eight lasted a week or longer, and the long ones came during big bull markets: 117 days in 2017, 71 days in early 2018 and 88 days from March to June 2021. Since 2022, none has lasted longer than 37 days, and the September 2025 season lasted 11. Altseasons are short-lived by nature because they are driven by capital rotation, a finite process that reverses once Bitcoin reasserts dominance or macro conditions shift. On November 2, 2026, the gap since the last season had reached 402 days, the second longest in Blockchaincenter’s data after the 486 days between September 2022 and January 2024.

The most common ways traders lose money in altseasons:

• Late entry during blow-off phases: buying after the index has been above 75 for a while, when funding rates are already elevated and social sentiment is euphoric. Sustained positive funding and extreme social engagement mark overheated stages that have come before sharp corrections.
• Leverage squeezes: using high leverage in the middle and late stages, when funding costs are rising. On October 10 and 11, 2025, more than $19 billion of leveraged positions were liquidated in about a day, a record widely reported by outlets including Decrypt, and altcoins fell much harder than Bitcoin.
• Single-narrative pumps: confusing a memecoin sector pump with a broad altseason. If breadth is narrow, the rotation is thematic, not structural.
• Token unlock cliffs: holding through a large scheduled token unlock without accounting for the supply shock.
• Regulatory shocks: sudden enforcement actions or exchange restrictions can drain altcoin liquidity faster than Bitcoin liquidity, because altcoin order books are thinner.

Risk controls traders commonly describe:

• Staggering entries across two or three tranches rather than deploying a full position at once.
• Placing stops below the most recent swing low on the ETH/BTC or coin chart rather than at a fixed percentage.
• Taking profits in stages, for example when the Altcoin Season Index first crosses 75 and again when funding rates spike. There is no standard size for each step, and none of these methods removes the risk of losses.
• Watching Bitcoin volatility dynamics even when the Bitcoin price is stable: low volatility can mask building pressure that unwinds into altcoins first.

How to read historical altseason charts and methodology differences

When you pull up a historical dominance chart, look for three things: the level at which dominance peaked before a major altseason, how long the decline lasted, and whether ETH/BTC broke its trend before or after dominance peaked. In 2025, ETH/BTC turned up in late June and peaked on August 24, before the index confirmed the season in September.

Methodology choices change what you see:

• Top 50 vs. top 100: a top-100 index is more exposed to small- and mid-cap moves, while a top-50 index leans on large caps. Neither is reliably faster: in September 2025, Blockchaincenter’s top-50 index crossed 75 a week before CoinMarketCap’s top-100 version, and on November 2, 2026, they read 39 and 47.
• 90-day vs. shorter lookbacks: a 30-day lookback is more reactive and produces more false signals. A 90-day lookback smooths noise but lags the actual regime shift by weeks. Blockchaincenter publishes both, plus a 365-day version.
• Exclusion rules: indexes that include liquid staking tokens or wrapped assets will show different readings than those that strip them out.

The sample is small. Blockchaincenter’s data contain 25 runs at 75 or above since 2017, but only eight of them lasted a week or longer, and seven lasted a single day. A methodology that looks optimal on a handful of historical episodes may not generalize. Use historical charts for context and pattern recognition, not as a precise predictive model.

How macro events and regulatory news affect altseason signals

Macro events can both accelerate and abort altseason conditions. A risk-on macro environment, with falling real yields, a weakening dollar or strong equity markets, tends to support capital rotation into higher-beta assets including altcoins. The reverse is equally true: a surprise rate hike or a risk-off shock can reverse a nascent altseason within days. The tariff-driven selloff of October 10, 2025, came less than three weeks after the last altcoin season ended.

Institutional flows through exchange-traded funds add a layer that did not exist in earlier cycles. Spot Bitcoin ETFs have traded in the US since January 2024 and spot Ether ETFs since July 2024, and after the SEC approved generic listing standards in September 2025, spot funds for altcoins such as Solana and XRP followed from late October 2025. Strong inflows into Bitcoin funds can hold dominance up even as altcoin prices rise, because institutional demand is concentrated in Bitcoin. That makes dominance a less clean signal than it was before ETFs.

Regulatory and security news tends to hit altcoins harder than Bitcoin because altcoin liquidity is thinner. A single enforcement action, a token classification ruling or a major exchange incident can cut altcoin breadth within hours, even if Bitcoin is less affected; most altcoins fell harder than Bitcoin after the October 29, 2026 Binance hack. During periods of elevated uncertainty, the index can also give a false positive: breadth looks strong until it suddenly does not.

The practical rule: check the macro and regulatory calendar before acting on any altseason signal. A dominance rollover that coincides with a scheduled Fed decision or a pending regulatory ruling deserves extra skepticism until the event passes.

A pragmatic view on using these indicators in 2026

The indicators covered here are genuinely useful, but none of them are oracles. The 2026 market is more institutionalized than any earlier cycle, with ETF flows, options markets and on-chain derivatives adding complexity that older index methodologies were not designed to handle. Bitcoin dominance is a noisier signal now because demand for Bitcoin-specific products can keep it elevated even as altcoin prices rise.

So far, 2026 has not produced an altcoin season. CoinMarketCap’s index ranged from 20 on January 1 to 64 on September 27, and Blockchaincenter’s from 22 on May 15 to 67 on August 2. No one can say when the next season will start; the checklist only shows whether the conditions are in place, and on November 2, 2026, they were not.

The traders who use these tools well treat them as a weight-of-evidence framework, not a checklist where three green boxes mean “buy everything.” Disciplined position sizing and pre-defined exit rules matter more than getting the entry perfectly right. Blockchainreporter’s ongoing market analysis and price coverage tracks dominance, ETH/BTC and rotation narratives, the kind of continuous monitoring these indicators require.

This article is for informational purposes only and does not constitute financial advice.

Frequently Asked Questions

What are the main altcoin season indicators?
The core indicators are the Altcoin Season Index, Bitcoin dominance, the ETH/BTC ratio and market breadth, with spot volume, perpetual funding rates, on-chain activity and social sentiment as supporting signals. The strongest signal is a combination: dominance falling, ETH/BTC rising and gains spreading across many coins, later confirmed by the Altcoin Season Index reaching 75 or more on a 90-day basis.

Is it altcoin season right now?
No. On November 2, 2026, CoinMarketCap’s Altcoin Season Index read 47 and Blockchaincenter’s 39, both neutral readings well below the 75 that marks an altcoin season. Bitcoin dominance was about 60%, near its 2026 high, and ETH/BTC had fallen about 8% over 30 days to about 0.0293. Neither index has shown an altcoin season since September 2025.

What Altcoin Season Index reading confirms altcoin season?
A reading of 75 or more confirms altcoin season, meaning at least three quarters of the top coins beat Bitcoin over the past 90 days. Readings of 25 or less mean Bitcoin season, and 26 to 74 a neutral market. Blockchaincenter uses the top 50 coins and CoinMarketCap the top 100, both excluding stablecoins and wrapped tokens, so their readings differ.

How does Bitcoin dominance signal altcoin season?
Bitcoin dominance is Bitcoin’s share of the total crypto market value. When it falls steadily from a peak while the overall market rises, money is usually rotating into altcoins. Before the September 2025 altcoin season, dominance fell from about 65% in late June to about 57% in mid-September. In November 2026 it stood near 60%, close to its 2026 high.

Why does ETH/BTC matter for altcoin season?
Ether is the largest altcoin and usually moves before smaller coins, so a rising ETH/BTC ratio is read as an early sign that risk appetite is spreading beyond Bitcoin. In 2025 the ratio nearly doubled between late June and August 24, weeks before the altcoin season began. On November 2, 2026, it was about 0.0293 and below its 50-day average, a weak signal.

How long does altcoin season last?
Usually not long. Blockchaincenter has recorded 25 altcoin seasons since 2017, lasting from 1 to 117 days, about 17 days on average, and half lasted four days or less. The longest came in bull markets: 117 days in 2017, 88 days in 2021 and 71 days in early 2018. Since 2022, none has lasted more than 37 days.

When was the last altcoin season?
The last altcoin season was in September 2025. Blockchaincenter’s index was at 75 or higher from September 11 to 21, peaking at 80, and touched 76 again on September 26, while CoinMarketCap’s index stayed above the line only from September 18 to 20. Before that, both showed a week-long altcoin season in early December 2024.

Where can I check altcoin season indicators for free?
Blockchaincenter and CoinMarketCap publish free Altcoin Season Index pages with current readings and history, and CoinGlass shows its own version next to funding rate and open interest data. TradingView charts ETH/BTC, Bitcoin dominance under the ticker BTC.D, and the TOTAL2 and OTHERS altcoin market series. Compare readings from the same source over time, because methods differ.

What signals that altcoin season is ending?
Common signs are Bitcoin dominance bottoming and turning up, ETH/BTC falling back below its 50-day moving average, funding rates spiking across many altcoins at once, extreme greed on sentiment gauges and gains narrowing to a few tokens. The Altcoin Season Index dropping back below 75 confirms the end, but it usually comes last because of its 90-day window.

When will the next altcoin season start?
No one can predict the date, and the indicators only show whether conditions are in place. On CoinMarketCap’s measure, about 74 of 99 top coins would need to beat Bitcoin over 90 days, against 47 on November 2, 2026. Traders watch for falling dominance during a rising market, a climbing ETH/BTC ratio and broadening gains as the first signs.

Do funding rates signal the top of altcoin season?
They can warn of one. Moderate positive funding on altcoin perpetuals is common during rallies, but sharp spikes across many coins show that the market is crowded with leveraged longs, which often comes before fast reversals. On October 10 and 11, 2025, more than $19 billion of leveraged positions were liquidated in about a day, and altcoins fell much harder than Bitcoin.

Sources

• Altcoin Season Index | CoinMarketCap
• Altcoin Season Index | Blockchaincenter

Index readings, season history, Bitcoin dominance, ETH/BTC and altcoin market cap come from CoinMarketCap and Blockchaincenter (read November 2, 2026), sentiment from Alternative.me’s Crypto Fear and Greed Index, and the CoinGlass reading from its index page. Season lengths, gaps and ETH/BTC averages are our own calculations from those providers’ daily data. For leading signals, TradingView’s ETH/BTC and BTC.D charts and CoinGlass funding rate data are the usual references; for lagging confirmation, most traders and analysts cite the CoinMarketCap and Blockchaincenter index readings.

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