Ethereum vs Bitcoin Flashes Rare Signal: Trader Warns Altcoin Boom May Be Near

A prominent market signal has just appeared on the Ethereum vs Bitcoin (ETH/BTC) chart, and traders are taking notice.

According to technical analyst Merlijn The Trader, Ethereum has printed a MACD bullish crossover, historically marking the bottom of the ETH/BTC cycle—a signal that has preceded major altcoin rallies in past crypto cycles.

The chart highlights that this rare signal has only occurred twice before in the last decade—once in 2017 and again in 2020, each time followed by explosive altcoin seasons. In both cases, alternative cryptocurrencies surged between 5x to 20x in just a few months. With the latest crossover now confirmed on the weekly chart, Merlijn calls this a “historic signal” that “only shows up once per cycle.”

The ETH/BTC ratio has spent months in a downward trend, recently reaching a structural low similar to those seen before the 2017 and 2021 altseasons. The MACD (Moving Average Convergence Divergence), a momentum-based indicator, has now flipped bullish, reinforcing the argument that Ethereum is regaining strength relative to Bitcoin.

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While some traders remain cautious amid broader market volatility, others see this as a sign that the altcoin engine is warming up once again. If history repeats, this MACD crossover could mark the start of a new rotation into riskier altcoins—with Ethereum likely leading the charge.

For those watching the ETH/BTC pair closely, this might be the cycle-defining moment they’ve been waiting for.