Ethereum (ETH) is showing strong bullish momentum against Bitcoin (BTC), having turned a four-year-old resistance level into support. Technical indicators such as the monthly MACD have displayed a bullish crossover, suggesting the onset of an altcoin market rally, commonly referred to as 'altseason.' Ethereum is approaching a key resistance level near $4,700, which historically attracted sellers during previous rallies in 2024 and the 2020-21 period. Bitcoin dominance has experienced a bearish crossover, a pattern that preceded significant altcoin market surges in 2017 and 2021. Analysts note that capital rotation typically flows from Bitcoin to Ethereum and then to broader altcoins, with current trends indicating liquidity moving into Ethereum. Ethereum has also broken above its 365-day moving average, a technical event associated with past major rallies and altseason phases.