Altcoin Season Is Showing Up in the Data But the Market Still Has Something to Prove
Something important has changed underneath the latest crypto rally.
Glassnode’s Altcoin Cycle Signal flipped from Bitcoin season into altcoin-season territory, reaching 81.25/100 in its September 22 update. The move matters because the market had previously been dominated by Bitcoin’s relative strength.
This time, the rotation is broader.
Glassnode’s latest research shows that 72.5% of tracked altcoins outperformed Bitcoin over the past week, compared with a peak of just 39% during the August rally. Importantly, Glassnode also notes that the recent altcoin move has occurred without a major expansion in altcoin perpetual-futures leverage, suggesting the move has been driven more by spot activity than by aggressive leverage.
But there is an important distinction investors should understand:
An 81.25 reading does not mean every altcoin has entered a new bull market.
Glassnode’s signal measures relative performance across a broad basket of large-cap altcoins against Bitcoin. It is therefore better understood as a rotation indicator than as a declaration that the entire altcoin market will continue rising.
The Market Is Rotating — But Breadth Still Matters
The broader crypto market has recovered alongside Bitcoin.
Recent market data put total crypto market capitalization back around the $3 trillion area, while Bitcoin itself pushed above $86,000 and reached an eight-month high.
That combination is important.
An altcoin rally that happens because Bitcoin collapses is very different from one that develops while Bitcoin remains strong.
Right now, Bitcoin has remained relatively resilient while capital has begun moving further down the risk curve.
That creates a more interesting market structure.
But rotation needs breadth.
If only a handful of tokens continue producing outsized gains while most of the market stops participating, the headline altcoin signal can look stronger than the underlying market actually is.
Bitcoin Dominance Is Falling — But Not Collapsing
Bitcoin dominance is another important piece of the puzzle.
Recent readings place BTC dominance around 57–58%, below the 60% level traders had been watching. However, the decline has not been a straight line.
One recent reading placed Bitcoin dominance at about 57.22%, compared with roughly 57.65% one month earlier and 56.78% one week earlier. That means Bitcoin's market share has eased over the monthly timeframe but has also moved higher from the previous week.
That distinction matters.
Capital appears to be rotating, but the data does not show a simple one-directional collapse in Bitcoin dominance.
Different Altseason Indicators Are Telling Different Stories
This is where things become particularly interesting.
Glassnode’s Altcoin Cycle Signal has reached 81.25, but another widely tracked Altcoin Season Index was around 56/100 on September 23, still below its 75-point threshold for altcoin-season territory.
The disagreement does not necessarily mean one indicator is wrong.
They measure different things.
Glassnode’s signal looks at relative performance across a broader basket, while other altseason indexes can use different asset selections and measurement periods.
That means the gap between the indicators is useful information.
It suggests that altcoin rotation is developing, but the market has not reached universal confirmation across methodologies.
ETH and SOL Are Important Pieces of the Rotation
The composition of the rally is also worth monitoring.
Solana has recently shown stronger performance relative to Bitcoin, while ETH/BTC and XRP/BTC have also moved higher, although with different degrees of strength.
Ethereum is particularly important because it remains the largest non-Bitcoin crypto asset and a major liquidity hub for DeFi and the wider altcoin ecosystem.
Reuters reported that Ether recently broke above a key technical resistance area around $2,661.52, following a consolidation period after a strong August rally.
If ETH continues to strengthen against BTC while participation expands across other major sectors, the broader rotation becomes easier to validate.
Leverage Is Another Important Variable
One of the more interesting details in Glassnode’s latest data is that altcoin participation has increased without a comparable surge in perpetual-futures open interest.
Glassnode reports that altcoin perpetual-futures open interest has barely increased over the past 30 days, while fewer than half of tracked markets added positions.
That matters because there is a difference between:
Spot-driven participation
and
Leverage-driven speculation.
A rally built primarily on spot demand has a different structure from one heavily dependent on traders continuously adding leveraged positions.
That does not guarantee the rally will continue. It simply provides another piece of evidence about how the current move is developing.
Macro Still Matters
Crypto is not moving in isolation.
Bitcoin’s recent rally has occurred alongside broader changes in risk appetite, while oil prices and Treasury yields have also been moving. Reuters recently reported that Brent crude had fallen below $100 while global equities remained firm, although monetary-policy uncertainty remained part of the broader market backdrop.
This matters because liquidity conditions can influence whether crypto rotation expands or fades.
A strong altcoin signal can exist at the same time as a difficult macro environment.
That is why the signal should be monitored rather than treated as a guarantee.
What Would Confirm a Sustained Altcoin Rotation?
For me, the important question is no longer simply:
“Is this altseason?”
The more useful question is:
“Can this rotation sustain itself?”
There are several things worth watching.
Bitcoin
Can BTC consolidate after its recent move without suffering a deep reversal?
Bitcoin dominance
Does the 57–58% area gradually weaken, or does dominance quickly recover?
ETH/BTC and major altcoins
Does relative strength continue spreading beyond a few names?
Market breadth
Are more sectors participating, or are returns becoming concentrated in a small group?
Liquidity
Does trading activity remain strong enough to support broader participation?
These indicators will tell us more than any single altseason score.
The Bigger Picture
The data has clearly shifted.
Glassnode’s 81.25 Altcoin Cycle Signal shows that relative strength has moved meaningfully toward altcoins. Recent Glassnode data also shows broader participation, with 72.5% of tracked altcoins outperforming Bitcoin over the past week.
At the same time, Bitcoin remains strong, dominance has only eased modestly, and other altseason indicators are not yet giving the same reading.
That is the key distinction.
The market is showing evidence of rotation.
But rotation is not the same thing as a confirmed, sustained market-wide altseason.
The next phase will be about breadth, persistence and liquidity.
If more sectors continue participating while Bitcoin remains stable, the current signal becomes increasingly meaningful.
If participation narrows again to a handful of tokens, the 81.25 reading may prove to have identified a period of relative altcoin strength rather than the beginning of a prolonged altseason.
The signal has changed.
Now the market has to prove what that change actually means.
#GlassnodeSignalFlipsToAltcoinSeason
