Altcoin Season 2026? Long-Term Chart Hints at 2017 and 2021 Repeat, Data Says Otherwise

An extended-term altcoin market cap chart exhibits a construction that preceded the final two altcoin seasons. The Altcoin Season Index, nevertheless, reads 35 and stays firmly in Bitcoin Season territory.

Two technical setups argue for a coming altcoin rally, whereas one real-time knowledge level argues towards it. The chart hints at a 2017 or 2021 repeat as Bitcoin dominance breaks out of accumulation.

Altcoin Market Cap Repeats a Pattern That Preceded 2017 and 2021 Rallies

X analyst el_crypto_prof revealed a weekly altcoin market cap chart displaying three structurally related setups throughout the previous decade. The complete altcoin market cap, excluding Bitcoin (BTC), at present sits close to $1.06 trillion.

The first setup ran via 2015 and 2016. Altcoins constructed an accumulation base, climbed an ascending trendline, then printed a fakeout under the road in late 2016. That fakeout marked the underside earlier than the parabolic 2017 altcoin rally.

The second setup performed out in 2019 and 2020. Compression alongside a descending trendline ended with the March 2020 Covid Crash fakeout. That fakeout preceded the 2020 and 2021 altseason explosion.

The present setup has proven the same construction since 2023. Altcoins constructed a base, climbed an ascending trendline via 2024, and lately printed a fakeout close to the higher boundary. Analyst Benjamin Cowen has flagged comparable cyclical alerts all through the cycle.

The analyst framed the sample in a publish on X.

“It could be completely loopy if Altcoins had been to repeat the story of 2016/2017 and 2020/2021, wouldn’t it? It’s beginning to look extra and extra seemingly, although. We’ve bought each purpose to be excited, guys.”

Bitcoin Dominance Breakout Threatens the Bullish Altcoin Setup

The bullish thesis wants Bitcoin dominance to roll over. The reverse simply occurred. Bitcoin dominance closed at 60.88% on the each day chart and broke out of an eight-month accumulation vary.

That vary held BTC.D between 58% and 60% from August 2025 to April 2026. The breakout factors to additional upside, with the prior cycle high at 66.06% as the following resistance space.

The 61% space has acted as a resistance a number of instances. BTC.D was rejected there on October 10, 2025, and November 5, 2025. Both rejections occurred close to a parallel ascending channel from earlier within the cycle.

Momentum indicators trace at exhaustion. The Relative Strength Index (RSI) was rejected from bullish territory and is rolling over. The Moving Average Convergence Divergence (MACD) simply printed a bearish cross.

If the rejection holds, the primary assist sits at 59.63%, the long-term 0.236 Fibonacci retracement. The subsequent assist is the 0.382 Fib at 55.66%. A transfer under 59.63% would open a path for altcoin outperformance.

Altcoin Season Index Reads 35, Confirming Alts Still Trail Bitcoin

The technical setups counsel a coming rotation. Real-time knowledge exhibits the rotation has not began. The Altcoin Season Index from blockchaincenter.web reads 35, deep inside Bitcoin Season.

The index measures how lots of the prime 50 cryptocurrencies outperform Bitcoin over the trailing 90 days. It excludes stablecoins and asset-backed tokens. A studying of 75 or increased alerts altcoin season, whereas a studying of 25 or decrease alerts Bitcoin season.

A 35 studying means roughly that share of prime 50 alts are beating Bitcoin proper now. Past altseason peaks seen on the chart pushed the index above 90. The present worth sits lower than half the altseason threshold.

Bitcoin’s share of complete crypto market cap holds close to 60.3% as of May 2026. Capital continues to favor Bitcoin as institutional inflows persist. BeInCrypto beforehand recognized key signals that would want to flip for altcoins to take the lead.

The binary is obvious. If Bitcoin dominance loses 59.63% and the Altcoin Season Index pushes above 50, the el_crypto_prof setup good points traction. If BTC.D extends towards 66% and the index stays under 50, the sample fails.

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