A high score indicates that a large share of major altcoins are outperforming Bitcoin, while a low score suggests that Bitcoin remains comparatively stronger. Under the commonly used methodology, an Altcoin Season begins when at least 75% of the selected top altcoins outperform Bitcoin over 90 days. Stablecoins and asset-backed tokens are generally excluded from the comparison.
In the updated market snapshot provided for this article, the Altcoin Season Index stands at 61. This shows that altcoins have gained relative strength, but the reading remains below the 75 threshold required to confirm an Altcoin Season. From here, the article explains how the index is calculated, how to read its signals, what has triggered altcoin seasons in past cycles, how traders use it in strategy, and where its benefits, limits, and risk-management implications matter most.
What Is Altcoin Season?
Altcoin Season is a period in which a broad group of cryptocurrencies other than Bitcoin delivers stronger returns than Bitcoin. It does not simply mean that a few altcoins are rising or that Bitcoin is declining. The defining feature is broad and sustained relative outperformance across the altcoin market.
An Altcoin Season may occur while the overall crypto market is rising, but it can also develop when Bitcoin trades sideways and capital rotates into other assets. During these periods, traders may seek higher growth opportunities in sectors such as smart contract platforms, decentralized finance, artificial intelligence, gaming, infrastructure, and tokenized real-world assets.
Altcoins often have smaller market capitalizations and thinner liquidity than Bitcoin. This can allow them to record larger percentage gains when demand increases, but it also makes them more vulnerable to sharp corrections, wider spreads, and sudden changes in market sentiment.
How Does the Altcoin Season Index Work?
The Altcoin Season Index compares Bitcoin’s 90-day price performance with the performance of a selected group of leading altcoins. It then calculates the percentage of those altcoins that generated a higher return than Bitcoin.
The basic calculation can be expressed as:
Altcoin Season Index = Number of qualifying altcoins outperforming Bitcoin ÷ Total number of altcoins measured × 100
For example, if 30 of the 50 measured altcoins outperform Bitcoin, the index would record a value of 60. If at least 75% outperform Bitcoin, the market qualifies as an Altcoin Season under the standard threshold used by the index.
The rolling 90-day window reduces the influence of isolated daily price movements. However, the index is still based on historical performance, so it describes the current market structure rather than predicting with certainty what prices will do next.
How to Read the Altcoin Season Index
The index is displayed on a scale from 0 to 100. Lower values favor Bitcoin, higher values favor altcoins, and readings in the middle indicate a mixed or transitional market.
| Index Range |
General Interpretation |
What It Suggests |
| 0–24 |
Bitcoin Season |
Most measured altcoins are underperforming Bitcoin |
| 25–49 |
Bitcoin-leaning market |
Bitcoin remains relatively stronger, but performance is becoming more mixed |
| 50–74 |
Transitional or altcoin-strengthening market |
More altcoins are outperforming Bitcoin, but the 75 threshold has not been reached |
| 75–100 |
Altcoin Season |
At least 75% of the measured altcoins have outperformed Bitcoin |
These ranges should not be treated as automatic trading signals. A reading of 74 does not mean that every altcoin is strong, while a move to 75 does not guarantee that the trend will continue.
The direction of the index also matters. A score rising from 30 to 60 may show that market breadth is improving even though Altcoin Season has not formally begun. A decline from 85 to 65 may indicate that altcoin momentum is weakening despite the score remaining relatively elevated.
Source: Blockchain Center
What Does the Current Altcoin Season Index Reading of 61 Mean?
A reading of 61 means that a meaningful share of leading altcoins has outperformed Bitcoin during the measured 90-day period. However, the score remains 14 points below the 75 threshold, so the market does not yet meet the index’s definition of Altcoin Season.
This reading is better described as a transitional or altcoin-strengthening phase. Capital may be moving beyond Bitcoin into selected sectors and tokens, but the outperformance is not broad enough to confirm a market-wide rotation.
The accompanying historical statistics also show that Altcoin Seasons have generally been less frequent and shorter than Bitcoin Seasons. In the supplied snapshot, the average Altcoin Season lasted 17 days, compared with 10 days for a Bitcoin Season, while the total recorded number of Bitcoin Season days was substantially higher. These figures reinforce that confirmed Altcoin Seasons are relatively selective market conditions rather than a permanent feature of every bull cycle.
The index can change as the rolling 90-day window updates. Assets with strong earlier returns may drop out of the calculation, while recent gains or losses may move more altcoins above or below Bitcoin’s performance.
The updated Top 50 performance chart shows significant differences among major crypto assets during the latest 90-day measurement period. RAIN led the displayed group with a gain of 78.8%, followed by ONDO at 52.6%, ZEC at 47.5%, HYPE at 41.7%, and WLD at 33.8%.
Other assets showing positive returns included NEAR at 30.1%, UNI at 19.4%, STABLE at 15.0%, XLM at 10.3%, AAVE at 6.2%, WBT at 5.5%, JTRSY at 3.6%, TRX at 3.2%, USDG0 at 2.8%, BUILDL at 2.7%, and MORPHO at 2.4%.
Bitcoin recorded a 14.2% decline in the same chart. Several assets that also posted negative returns still outperformed Bitcoin because they declined by less, including BNB at −5.9%, LINK at −6.3%, SOL at −9.3%, ICP at −9.8%, and LTC at −13.7%.
This distinction is important: an altcoin does not need to produce a positive return to outperform Bitcoin. If Bitcoin falls by 14.2% while an altcoin falls by 5%, the altcoin counts as an outperformer under a relative-performance methodology even though holders still experienced a loss.
Source:Blockchain Center
The chart therefore explains why the index can rise to 61 without confirming a full Altcoin Season. Several altcoins substantially outperformed Bitcoin, but the strength was still concentrated in part of the market rather than spread across at least 75% of the measured assets.
What Does the Historical Altcoin Season Index Show?
The historical chart tracks changes in the index from August 2021 through mid-2026. It shows repeated movement between Bitcoin-dominated periods, transitional phases, and relatively brief Altcoin Seasons.
Readings above 75 appeared during several distinct periods, including parts of late 2021, the second half of 2022, early 2024, late 2024, and late 2025. However, these elevated readings were often followed by rapid declines, demonstrating that broad altcoin outperformance can be temporary.
The chart also shows extended periods below 25, particularly around mid-2023 and parts of 2025. These readings indicate that Bitcoin outperformed most of the measured altcoins during the corresponding rolling 90-day windows.
By mid-2026, the index had recovered from a reading near the lower boundary and moved to around 61. The upward direction suggests improving altcoin breadth, but the historical record shows that the index can reverse before reaching or sustaining the Altcoin Season threshold.
Source: Blockchain Center
What Factors Can Trigger an Altcoin Season?
An Altcoin Season usually develops through a combination of capital rotation, improving risk appetite, sector-specific narratives, market liquidity, and Bitcoin’s price behavior. No single factor guarantees that the index will rise above 75.
Bitcoin often leads the early stage of a crypto market expansion. Once Bitcoin has risen substantially or begins consolidating, some traders may move capital into higher-risk altcoins in search of additional returns. This rotation can cause a growing number of altcoins to outperform Bitcoin.
Falling Bitcoin dominance can support the same interpretation. Bitcoin dominance measures Bitcoin’s share of the total crypto market capitalization. When capital flows into altcoins faster than into Bitcoin, Bitcoin dominance may decline while the Altcoin Season Index rises.
Strong sector narratives can also broaden altcoin performance. Developments in AI, DeFi, Layer 1 and Layer 2 networks, tokenized assets, gaming, privacy technology, or interoperability may attract capital into multiple related tokens rather than a single asset.
Additional conditions that may support altcoin outperformance include:
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Expanding stablecoin liquidity and trading volume;
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Higher demand for risk assets across global markets;
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Increased on-chain activity and protocol revenue;
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New product launches, upgrades, or ecosystem incentives;
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Improved regulatory clarity;
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Stronger retail participation and speculative activity.
These factors can improve the environment for altcoins, but they can also produce narrow sector rallies that never develop into a broad Altcoin Season.
How Can Traders Use the Altcoin Season Index?
The index is most useful as a market-breadth indicator within the broader cryptocurrency market. It helps investors and traders identify possible portfolio rotation into alternative cryptocurrencies for potential profits by showing whether performance is concentrated in Bitcoin, limited to a few altcoins, or expanding across a larger share of the market.
A rising index may encourage traders who are tracking market trends to investigate which sectors and assets are driving the change. Rather than buying the strongest performer automatically, they can use it as one of several key indicators to support investment decisions by examining trading volume, market capitalization, liquidity, token supply, project fundamentals, and whether recent gains are supported by identifiable developments.
A falling index may indicate that capital is rotating back toward Bitcoin or that altcoin momentum is weakening, which can point to a potential altcoin season fading rather than broad strength. This information may help users reassess exposure, adjust investment strategies, or accumulate positions in projects with strong fundamentals, but it does not mean every altcoin will decline.
The index can be evaluated alongside other indicators to read market trends, overall market sentiment, and possible sector rotation more accurately:
| Indicator |
What It Adds |
| Bitcoin dominance |
Shows whether Bitcoin is gaining or losing its share of total crypto market capitalization; traders often cross-reference the index with Bitcoin Dominance charts to confirm market conditions and see when some assets may outperform BTC |
| Total altcoin market capitalization |
Measures whether capital is entering or leaving the broader altcoin market |
| Trading volume |
Helps confirm whether price moves are supported by active participation |
| Market liquidity |
Indicates whether positions can be entered or exited without excessive slippage |
| Relative strength against BTC |
Shows how an individual altcoin performs directly against Bitcoin |
| Token unlock data |
Identifies potential changes in circulating supply |
| On-chain activity |
Helps assess whether network usage supports market interest and may reveal potential investment opportunities |
The Altcoin Season Index is not designed for precise entry timing. Because it uses a 90-day performance window, a high reading may appear after many assets have already produced substantial gains, so it should be combined with other analysis because it does not predict future returns or account for individual project fundamentals.
Does a Rising Index Mean Every Altcoin Will Rise?
No. The index measures the number of selected altcoins outperforming Bitcoin, not whether every altcoin is profitable or likely to appreciate.
Performance can vary widely even during a confirmed Altcoin Season. Large-cap assets may attract most of the liquidity, while smaller tokens remain flat or decline. Sector leadership can also rotate quickly as traders move from one narrative to another.
The index only represents the assets included in its methodology. Thousands of smaller or less liquid cryptocurrencies are not captured, and many may behave very differently from the selected top assets.
A token may also count as outperforming Bitcoin while still recording a negative return. Relative strength should therefore not be confused with absolute profitability.
What Are the Benefits of the Altcoin Season Index?
The main benefit of the Altcoin Season Index is that it converts a broad set of relative-performance data into a single score. Instead of manually comparing dozens of assets with Bitcoin, users can quickly assess whether altcoin market breadth is strengthening or weakening.
Its rolling 90-day methodology also reduces the influence of isolated price spikes. A one-day rally in several tokens is unlikely to create an Altcoin Season unless the wider group maintains stronger returns than Bitcoin over a longer period.
The index is also easy to interpret. The 25 and 75 thresholds provide clear reference points, while the historical chart gives users context for the duration and frequency of previous market phases.
Used alongside volume, liquidity, Bitcoin dominance, and fundamental research, the index can help organize market analysis without requiring it to serve as a standalone trading signal.
What Are the Limitations of the Altcoin Season Index?
The index is backward-looking because it is based on price performance over the previous 90 days. By the time the reading reaches 75, some of the strongest-performing assets may already have recorded large gains and may be vulnerable to profit-taking.
Its results also depend on the selected asset group and methodology. Changes in market-cap rankings can alter which cryptocurrencies are included, while stablecoins and certain asset-backed tokens are excluded. A different provider or selection method may produce a different reading.
Relative outperformance can also be misleading during a declining market. If Bitcoin loses 20% and an altcoin loses 10%, the altcoin has outperformed Bitcoin even though both assets have fallen.
The index does not directly measure:
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Project fundamentals or protocol adoption;
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Token unlocks and changes in circulating supply;
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Trading liquidity and market depth;
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Regulatory or security risks;
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Valuation and future revenue potential;
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Whether an individual token has already become overextended.
For these reasons, the index should not be treated as a signal to buy all altcoins or automatically reduce Bitcoin exposure. It describes market breadth, not the quality or future performance of individual assets.
How to Manage Risk During an Altcoin Season
Altcoins can experience high volatility and lower liquidity than Bitcoin, particularly when speculative activity increases, and these phases often last roughly 2 to 3 months, with the most intense moves sometimes concentrated within a few weeks. A token that rises quickly can also reverse sharply when traders take profits or market sentiment changes.
Position size is therefore an important part of risk management. Users should avoid allocating more capital than they can afford to lose and should consider how one position would affect the total portfolio if its value declined substantially.
Order type and liquidity also matter. Market orders may produce significant slippage in thin order books, while limit orders provide more price control but may not execute. Trading volume should always be assessed together with the latest quoted price.
Users should also verify token supply information, vesting schedules, smart contract risks, and official project developments. Strong historical performance alone does not show whether future demand can absorb new supply or whether the project has sustainable usage.
Summary
The Altcoin Season Index measures how many leading altcoins have outperformed Bitcoin over a rolling 90-day period. A reading above 75 generally indicates Altcoin Season, while a score below 25 points toward Bitcoin Season.
The updated index reading of 61 shows that altcoin relative strength has improved, but the market has not yet crossed the threshold for a confirmed Altcoin Season. The latest performance chart supports this interpretation: several assets significantly outperformed Bitcoin, but the strength was not broad enough across the full group.
Historical data shows that confirmed Altcoin Seasons can be relatively brief and may reverse quickly. The index is therefore most useful for understanding market breadth and capital rotation rather than predicting exact entry or exit points.
Users should combine the index with Bitcoin dominance, market capitalization, trading volume, liquidity, token supply, and project fundamentals. Relative outperformance does not guarantee positive returns, and no index can remove the risks associated with trading volatile altcoins.
FAQ
What Is the Altcoin Season Index?
The Altcoin Season Index is a 0–100 indicator that measures how many selected leading altcoins have outperformed Bitcoin over a rolling 90-day period.
What Index Score Confirms an Altcoin Season?
An Altcoin Season is generally confirmed when at least 75% of the measured altcoins outperform Bitcoin over 90 days, producing an index reading of 75 or higher.
Is an Altcoin Season Underway at an Index Reading of 61?
No. A score of 61 indicates improving altcoin strength, but it remains below the 75 threshold used to confirm an Altcoin Season.
What Does Bitcoin Season Mean?
Bitcoin Season describes a period when Bitcoin outperforms most of the altcoins included in the index. It is generally associated with an index reading below 25.
Can the Index Rise When Altcoin Prices Are Falling?
Yes. Altcoins can outperform Bitcoin on a relative basis while still losing value. For example, an altcoin falling 5% outperforms Bitcoin if Bitcoin falls 15%.
Does the Altcoin Season Index Predict Which Altcoin Will Rise?
No. The index measures broad relative performance and does not predict which individual token will rise. Each asset still requires separate research into liquidity, supply, valuation, and project fundamentals.
