Three Altseason Signals Flash With the Index Halfway to Confirmed

What the Signals Are Saying

Bitcoin dominance climbed close to 60% during the first half of 2026, driven by spot ETF inflows, institutional accumulation, and macro uncertainty that kept capital concentrated in the largest asset. That trend is now showing its first technical crack.

CryptoQuant analyst CryptoOnchain identified a bearish MACD crossover on the BTC dominance chart, a momentum signal indicating the uptrend in Bitcoin’s market share is losing force. Alongside it, the Altcoin Volume Increasing Trend has activated: the 30-day moving average for altcoin trading volume on centralized exchanges has crossed above the 365-day moving average in the CEX Volume Ratio measuring other assets against the top five by volume. In 2021, sustained clusters of this signal coincided with the most explosive altcoin rallies of that cycle.

Price action is beginning to reflect the shift. SOL and SUI have posted double-digit gains in recent sessions while ETH remains relatively stable, suggesting capital is expanding beyond Bitcoin into higher-beta assets. The altcoin market cap has risen from approximately $960 billion to approaching $1.1 trillion over the 90-day window visible on the CoinMarketCap index chart.

What the Index Actually Shows

The Altcoin Season Index from CoinMarketCap provides the most direct measurement of whether rotation has become broad. It currently reads 50. The threshold for confirmed altcoin season is 75. Bitcoin season is defined as readings below 25. At exactly 50, the market sits in the middle of the range, not in Bitcoin season and not in altcoin season. The index briefly touched near 100 in mid-March before pulling back sharply, spent April oscillating near the lower end of the range, and has now recovered to 50 as of early May.

That recovery matters, but the 25-point gap to confirmation matters more. The volume signal and the dominance crossover are leading indicators, they measure momentum and flow. The Altcoin Season Index measures outcomes: whether the majority of the top altcoins are actually outperforming Bitcoin over a defined window. The signals are pointing in the right direction. The scoreboard has not yet agreed.

The On-Chain Contradiction

CryptoOnchain’s broader analysis includes a data point that cuts against the altseason narrative: MVRV and Profit/Loss Margin remain below previous cycle peaks, and long-term holders continue showing limited selling behavior. The source presents this as confirmation the broader crypto market is still in the early stages of a bull cycle. That reading is correct. The contradiction it creates is less visible.

Bitcoin’s dominance does not fall sustainably until Bitcoin itself has completed or nearly completed its own cycle move. In both 2017 and 2021, the periods of dramatic altcoin outperformance arrived after Bitcoin had already made its major advance and capital sought higher returns elsewhere. MVRV sitting below previous cycle peaks implies Bitcoin has not finished that advance. Capital rotating into altcoins before Bitcoin peaks has historically produced short rotations, sharp but brief, rather than the sustained altseason the historical analogies describe. The signal is real. The duration question is what the on-chain data leaves open.

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The Failed Setups the History Skips

The 2017 and 2021 precedents cited by CryptoOnchain are accurate. They are also the two most favorable examples available. Since the 2021 peak, BTC dominance has shown bearish MACD crossovers on multiple occasions without producing a sustained altseason. Each time, dominance recovered and altcoins gave back their relative gains. The current setup is more developed than those prior attempts, the volume signal is active, the index is rising, specific assets are already moving, but the pattern that failed several times between 2022 and 2025 looked similar at the early stage. What distinguished 2017 and 2021 from the failed attempts was duration and breadth. Neither is yet confirmed in the current data.

Signals That Confirm or Cancel

Confirmation: the Altcoin Season Index crosses and holds above 75 within the next 30 days, with the CEX Volume Ratio sustaining the Altcoin Volume Increasing Trend signal for at least three consecutive weeks. That combination would indicate rotation has moved from a momentum signal to a confirmed structural shift in capital allocation.

Denial: the Altcoin Season Index reverses below 35 within the next two weeks, or BTC dominance recovers above 60% on a weekly close. Either outcome repeats the pattern of failed rotation attempts that have appeared since 2022 and returns the market to Bitcoin-led structure.

The three signals pointing toward rotation are the most developed cluster of altseason indicators since 2021. The Altcoin Season Index at 50 is the most honest number in the data: it says the rotation has started, not that it has arrived. Those are different conditions, and the distance between them is exactly where this market sits now.

The information provided in this article is for educational purposes only and does not constitute financial, investment, or trading advice. Coindoo.com does not endorse or recommend any specific investment strategy or cryptocurrency. Always conduct your own research and consult with a licensed financial advisor before making any investment decisions.

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