A rare technical signal has appeared in the crypto market, igniting speculation that a new altcoin supercycle could be forming. According to traders monitoring long-term charts, the MACD (Moving Average Convergence Divergence) for the Altcoins vs Bitcoin pair has just triggered its third bullish cross in eight years, a pattern that historically marked the start of explosive altcoin rallies in 2018 and 2021.
THE RAREST ALTCOIN SIGNAL JUST FIRED.
Only 3 MACD crosses in 8 years.
Each one kicked off an altcoin supercycle.This is where the quiet turns into chaos.
Before the noise. Before the hype.Retail won’t believe it until it’s too late. pic.twitter.com/xNoxeyJTPe
— Merlijn The Trader (@MerlijnTrader) October 27, 2025
Market analyst commentary describes this as the phase where “the quiet turns into chaos”, an early accumulation window before retail investors catch on. Each of the past two crossovers led to significant capital rotation from Bitcoin into the broader altcoin market, with Ethereum, Solana, and smaller ecosystem tokens seeing triple-digit percentage surges within months.
Adding to the narrative, trader Michaël van de Poppe highlighted what he considers one of the most asymmetric opportunities in the current market setup, pointing to selective altcoins positioned for outsized gains once momentum returns. He noted that despite the recent correction, altcoins appear to be bottoming out and could post stronger rebounds than in previous cycles once liquidity flows back in.
In my opinion, one of the best opportunities in the markets.
Very glad that I've got $W allocated in the #Altcoin portfolio in the size that I've got it allocated.
The #Altcoins were about to break to the upside, although the market crash wiped everything out again.
That's why… pic.twitter.com/FVbSe3OpbC
— Michaël van de Poppe (@CryptoMichNL) October 27, 2025
The timing of this signal coincides with increasing institutional exposure to the crypto sector and anticipation of upcoming FOMC rate decisions, which could favor risk-on assets. Historically, similar setups have preceded broad rallies across the altcoin market as volatility returns and market confidence strengthens.
If the MACD crossover plays out as it did in prior cycles, analysts suggest this could mark the start of a new multi-year altcoin phase, one defined by expanding on-chain activity, higher market participation, and the potential for another wave of decentralized innovation.