#AltcoinBreakout signals a significant bullish movement in the cryptocurrency market, where altcoins (all cryptocurrencies other than Bitcoin) outperform BTC. A "breakout" occurs when the price breaks a key resistance, often with high trading volume, indicating a new bullish trend. This phenomenon suggests an imminent or ongoing "altcoin season," where capital flows from Bitcoin to altcoins, seeking higher returns. Identifying these breakouts is crucial for traders, but requires careful analysis and risk management.