When $BTC is in a strong uptrend, $SOL moves in the same direction.
When BTC falls: SOL also falls, and due to SOL's higher volatility, the percentage decline can be greater than that of BTC.
Mudrex +1
Correlation: Recent data shows the SOL-BTC correlation hovering around the +0.8 range, indicating that their movements are closely linked.
Glassnode Studio
But not 100% identical: It is not uncommon for SOL to move independently of BTC due to factors such as Solana-specific news, ETF inflows, network activity, or upgrades.