Solana finished September 2026 at +15%. If you held only the best days, the return jumps to +52.9%, while missing them drops it to -25.1%. That tells you the month was driven by a handful of outsized sessions rather than smooth trend strength. The biggest upside day was 9/18/26 (+11.7%), and the roughest day was 9/15/26 (-5.6%) $SOL