According to @rovercrc, the $ETH vs $BTC monthly MACD has printed a bullish crossover on the ETH/BTC chart (source: @rovercrc on X, Aug 15, 2025). He frames this as Altseason confirmed, suggesting a potential rotation toward ETH and altcoins relative to BTC in the coming period (source: @rovercrc on X, Aug 15, 2025). In technical analysis, a MACD bullish crossover is commonly viewed as an upside momentum signal, with higher timeframes like the monthly chart carrying greater weight for trend shifts (source: Investopedia, Moving Average Convergence Divergence). Traders tracking the ETH/BTC pair often use such momentum signals to position for relative strength in ETH and selected altcoins versus BTC while confirming with volume and key levels (source: Investopedia, MACD; source: Binance Academy, What Is Altseason?).