Altseason is a period when altcoins rise faster than Bitcoin. It draws plenty of attention in every crypto bull market. The numbers show it is also less common than many investors expect.
On October 12, 2026, the Altcoin Season Index reads 59. That is below the 75 mark needed to call a true altseason. The last one ended 381 days ago, based on Blockchain Center data.
This article walks through the statistics behind altcoin cycles. It covers the index, Bitcoin dominance, how long seasons last, what happened in past cycles and how investors try to use the data. It is for information only and is not financial advice.
What Is Altseason and How Is It Measured?
Altseason, short for altcoin season, is a stretch when altcoins rise faster than Bitcoin. An altcoin is any cryptocurrency other than Bitcoin. In these periods, money moves out of Bitcoin and into other coins.
Bitcoin usually sets the direction for the market because of its size. In an altseason, that balance shifts. Bitcoin’s share of the market falls, and many altcoins climb while Bitcoin moves sideways or gains little.
Altseasons often start after a strong Bitcoin run. Investors who made money on Bitcoin look for new places to put their gains. Altcoins have smaller market caps, so they can rise faster when new money arrives.
Bitso describes this as a cascade. Money first flows into Bitcoin, then into Ethereum and other large altcoins. Later it reaches smaller and more speculative tokens.
Social media adds fuel. Fear of missing out spreads, and influencers talk less about Bitcoin and more about hidden gems. Sources treat this shift in attention as a sign of a changing mood.
The most common measure is the Altcoin Season Index. It checks how many of the top 50 altcoins beat Bitcoin over the past 90 days. Stablecoins and asset-backed tokens such as WBTC and stETH are left out.
The index runs from 0 to 100 and has three zones.
| Index reading | Zone | What it means |
|---|---|---|
| 0 to 25 | Bitcoin season | Fewer than a quarter of the top 50 altcoins beat Bitcoin |
| 26 to 74 | Neutral | A mix of winners, with no clear leader |
| 75 to 100 | Altcoin season | At least 75% of the top 50 altcoins beat Bitcoin |
Different sites publish their own versions. CoinMarketCap and CoinGlass both have one, and the methods differ. Sources say the trends tend to look alike.
One limit is worth knowing. The index looks backward, so by the time it shows an altseason, the best entry prices may be gone.
Where the Altcoin Season Index Stands Today
On October 12, 2026, the Blockchain Center index reads 59. That puts the market in the neutral zone. The site states that it is not altcoin season.
The same page shows a month reading of 57 and a year reading of 41. All three sit between the Bitcoin season line of 25 and the altcoin season line of 75.
One source describes the current level as a recovery from single-digit lows earlier in 2026. It gives a range of 35 to 59, depending on how the data is grouped. The reading is still well below the 75 threshold.
The index last changed zones on September 2, 2026, moving from Bitcoin season to neutral. That shows Bitcoin’s lead has narrowed. It does not show that altcoins have taken over.
To reach altseason, the index would need to rise 16 points from 59. In 2021, the index hit 98 on April 16, which shows how high it can go in a strong cycle.
SoFi names three other signs that a season may be starting. Bitcoin’s price steadies after a major rally, new stories such as DeFi, AI and GameFi take over the news, and retail interest jumps on social media. None of these is part of the index, and each can fade fast.
Bitcoin Dominance: The Other Key Number
Bitcoin dominance is Bitcoin’s share of the total crypto market value. Sources say it normally sits between 60% and 65%. A fall below 50% often points to an altcoin season.
In extreme cases, dominance has dropped to between 35% and 40%. Today it sits at roughly 58.3% to 60%, depending on the day and the data provider.
Analysts quoted by one source name a confirmed break below 55% as the key level for this cycle. Another source says broad altseasons usually need dominance to fall below 50% to 55%.
| Cycle | Dominance at start | Dominance at low | Source |
|---|---|---|---|
| 2017 to 2018 | 86.3% (late 2017) | 38.69% (early 2018) | Altcoin season explainer, Oct 2026 |
| 2020 to 2021 | 70% | 38% to 40% | Altcoin season explainer and Bitso |
| 2022 | 65% | About 40% | CoinMarketCap data via Delubac |
| October 2026 | Not applicable | About 58.3% to 60% | Altcoin season explainer, Oct 2026 |
A drop in dominance can come from two causes. Altcoins can rise faster, or Bitcoin can fall. In 2017 and 2018, Bitcoin fell from a record above $20,000 to below $6,000 within a few months.
That is why dominance works best when read alongside the index and trading volume. One number alone can mislead.
Bitso points to a second ratio. The ETH/BTC pair shows how much Ethereum is worth in Bitcoin. When it rises steadily, the market is paying more for risk than for safety.
Ethereum has often led the rotation. Large altcoins tend to follow, and small ones come last. When the ratio turns down, the rally is often ending even if dollar prices are still high.
How Often Do Altseasons Happen, and How Long Do They Last?
Blockchain Center classes every day since 2017 as Bitcoin season, neutral or altcoin season. Its season statistics show that altcoin seasons are the less common of the two.
| Measure | Altcoin season | Bitcoin season |
|---|---|---|
| Days since last season | 381 | 41 |
| Average days between seasons | 67 | 21 |
| Longest streak without a season (days) | 486 | 308 |
| Average length of a season (days) | 17 | 10 |
| Longest season (days) | 117 | 126 |
| Total days of season | 416 | 956 |
Bitcoin seasons have filled 956 days, more than twice the 416 days for altcoin seasons. The longest altcoin season lasted 117 days, while the longest Bitcoin season ran 126 days.
The average altcoin season lasted 17 days. The average gap between them was 67 days. The current gap is 381 days, which is long but still shorter than the record of 486 days.
Written guides give longer estimates. SoFi says seasons have lasted one or two months. Another source says a few weeks to a couple of months. A third source says a week to several months.
The 17-day average is shorter than those ranges. A likely reason is that it counts only days when the index sits at 75 or higher. Rallies described in news and social media can run longer than that.
These numbers have limits. They rely on one site’s method and a 90-day window, and another index could give different counts. The pattern is still clear. Bitcoin leads more often, and altcoin leads come in short bursts.
What Happened in Past Altcoin Cycles
The sources point to three main cycles. Each had different drivers and different results.
| Cycle | Main drivers | Key figures |
|---|---|---|
| 2017 to 2018 | Speculation, many coin offerings, rule changes in Japan, Ethereum becoming the second-largest crypto | Index above 75 in January 2018; dominance fell from 86.3% to 38.69% |
| 2020 to 2021 | Pandemic-era trading, stimulus, NFTs, meme coins | Index hit 98 on April 16, 2021; dominance fell from 70% to 38% |
| 2024 to 2025 | Bitcoin spot ETF approvals, April 2024 halving, Solana memecoins | Strong phases, but not as long or broad as 2017 or 2021 |
The 2017 cycle was driven by speculators, new project launches and a flood of money. Ethereum, Ripple, Litecoin and Bitcoin Cash were among the top performers.
The 2021 cycle came during the pandemic. Fed bond purchases and stimulus pushed investors toward risk, and NFTs and meme coins drew new buyers. Shiba Inu, Dogecoin, Solana and Polygon were among the leaders.
Bitso gives figures for January to May 2021. Bitcoin rose about 90%, while Dogecoin rose more than 12,000%. Solana went from $1.50 to $55.
The ending was sharp. In the May 2021 correction, most of those tokens lost more than half their value in two weeks.
The 2024 to 2025 period looked different. Ethereum, Solana and many Layer-1 and Layer-2 tokens gained after the ETF approvals and the halving. Memecoins such as WIF and BONK had large runs, but the rally never matched the earlier cycles in length or breadth.
SoFi draws one lesson from these cycles. Crypto markets are often driven by hype and heavy speculation. Outside events, such as a health emergency or softer government views on crypto, also played a part.
In each case the market was hard to predict while it was happening. Most people only knew they were in an altseason once it was underway.
Market Conditions in October 2026
Bitcoin recently rose past $86,000. One source credits steady ETF inflows and company treasury buying. Dominance is near 58.8% to 60%.
Interest rates are the main pressure. The Federal Reserve policy rate sits at 3.75% to 4.00%. September payrolls added just 29,000 jobs.
Market odds put the chance of a hold at the October 27 to 28 meeting at about 84%. CME FedWatch and Kalshi place the chance of a rate hike in December at 65% to 75% or more.
| Indicator | Reading | Altseason threshold |
|---|---|---|
| Altcoin Season Index | 59 | 75 or higher |
| Bitcoin dominance | About 58.3% to 60% | Below 50% to 55% |
| Fed policy rate | 3.75% to 4.00% | Falling rates and extra liquidity help risk assets |
| Treasury yields | About 5% | Lower yields help risk assets |
Rates matter because Bitcoin and altcoins pay no yield. They compete with cash and bonds for investor money. In 2021, Fed bond purchases helped lift one of the strongest altcoin seasons on record.
The September CPI report is due on October 14. A hot inflation number could push money back toward cash.
Token supply also affects prices. Ethena (ENA) fell about 9% ahead of an unlock of 3.03 billion tokens. Real-world asset tokenization, next-generation DeFi and AI infrastructure are drawing the most focused inflows this year.
Institutional money adds another layer. One source says the market is more crowded now because of institutional inflows. That means past cycles may not repeat in the same way.
A hold in October would give the market some breathing room. A hike in December would put more pressure on speculative assets.
Why Altcoins Move So Fast, Up and Down
Size is the main reason. Bitcoin is worth trillions of dollars. Many altcoins have market caps under $10 billion, and some are worth only a few million.
Bitso notes that moving a $100 million token takes a fraction of the money needed to move Bitcoin by 1%. That works in both directions.
Sources cite gains of more than 300% in a few months for some altcoins. Solana is said to have gained 300% in two weeks during one run. Memecoins have posted gains of 1,000% in a month.
Losses can be just as quick. Prices can fall 30% to 50% or more in hours. Some coins never reach a new high after dropping more than 90% in a bear market.
Other risks are listed in the sources. Weak projects can surge on hype and then crash. Small coins can be hard to sell at a fair price. New laws can change trading rules fast, and rug pulls still happen.
Bitso offers one late-stage signal. When two-week-old memecoins lead the market, there is often little room left to run.
How to Invest in Altseason Using the Data
Every source agrees that nobody can time an altseason with certainty. The data can still help investors set rules before the money is on the line.
| Signal | What to watch | Why it matters |
|---|---|---|
| Altcoin Season Index | A reading above 75 | Shows most of the top 50 altcoins are beating Bitcoin |
| Bitcoin dominance | A steady fall, especially below 55% | Suggests money is moving into altcoins |
| ETH/BTC ratio | A steady rise | Ethereum has often led the rotation |
| Trading volume | Rising altcoin volume versus Bitcoin | Confirms new money is flowing in |
| Fear & Greed Index | Extreme Greed | Often appears when a season is near or underway |
Research comes first. Check how many tokens are in circulation and how supply is split. Look at the technology, the roadmap and whether developers are active.
Be careful with influencers. The sources warn that many promote tokens for their own profit.
Diversification comes next. Large coins such as Ethereum, Solana and Ripple tend to be steadier than mid-caps and small caps. Some investors keep part of a portfolio in stablecoins or Bitcoin as a buffer.
Exits matter as much as entries. One source describes a simple method. Sell 10% of a position each time the coin rises 20%.
Limit orders and stop-loss orders can take emotion out of trades. Some investors also move part of their gains into stablecoins such as USDC.
A few other rules appear across the sources.
Set a budget and never invest more than you can afford to lose. Count transaction fees, which add up with frequent trading. Use secure wallets and two-factor authentication.
Last, watch for fear of missing out. By the time most retail traders notice a rally, coins may already be up 300%. Buying then often means buying near the top.
Altseason Statistics: Common Questions
What Altcoin Season Index reading counts as altseason?
A reading of 75 or higher counts as altseason. It means at least 75% of the top 50 altcoins beat Bitcoin over the past 90 days. A reading of 25 or lower is called Bitcoin season.
Is it altseason right now?
No. The index reads 59 and Bitcoin dominance is near 59%. Both sit short of the levels seen in past altseasons.
How long do altseasons last?
Blockchain Center puts the average at 17 days and the longest at 117 days. Written guides say a few weeks to several months.
What is a normal level for Bitcoin dominance?
Sources say Bitcoin usually holds between 60% and 65%. A fall below 50% often points to an altcoin season.
Can anyone predict an altseason?
No source claims a reliable method. The index, dominance and trading volume help, but they often move after the rally has started.
What usually ends an altseason?
Bitso says it ends when new money runs out and gains cluster in coins with no fundamentals. SoFi adds that a Bitcoin rally can signal a return to Bitcoin’s lead.
What the Numbers Say
The Altcoin Season Index reads 59, and Bitcoin dominance is near 59%. Both sit short of the levels that have marked past altseasons. The last altcoin season ended 381 days ago.
History shows that altseasons are short, with an average of 17 days on Blockchain Center’s count. They can also be sharp, as 2021 showed. Gains and losses of several hundred percent have both been reported.
Whether another altseason arrives in 2026 or 2027 is unknown. The sources point to interest rates, Bitcoin’s trend and investor sentiment as the main factors. Readers should do their own research before acting.
Sources
- Understanding Altcoin Season: Trends, Triggers, and Strategies
- What is altseason and will there be one in 2026/2027?
- Altcoin Season: understanding this opportunity
- Altcoin Season: How to Catch the Wave Before It Peaks
- What is Altcoin Season? When is Altseason in October 2026?
- Altcoin Season Index
- What is altseason?
