ETH completed its 4th test of the key price near 3545, forming a very effective support power in the medium-term trend. If there is a subsequent 'double test' market, relying on this key price level to see a bottoming signal, then the price is expected to rise, and the level of volatility will expand. If Ethereum can stabilize, then altcoins have the hope of bouncing, so pay attention to the strength and weakness reaction at this position.