Ethereum's Pectra upgrade has launched on the Holesky testnet, with a mainnet launch expected soon.The upgrade brings key improvements for validators, wallets, and layer-2 scaling.If Ethereum drops below $2,107 and $2,049, it could trigger $582 million and $705 million in liquidations.ETH needs to retest $2,600 and $2,700 resistance levels before a potential rally.