Ethereum (ETH) and Solana (SOL) are forming a potential weekly 'W' bottom pattern, according to John Bollinger, the creator of Bollinger Bands. This pattern has not been observed in Bitcoin (BTC), where dominance is reportedly nearing a trend reversal. Analyst Dan Gambardello suggests this shift could signal the onset of an altseason. A weekly close above the middle Bollinger Band would confirm base building for ETH and SOL, indicating potential upward momentum for these altcoins.