Propypro#587

Correlation of the daily returns with Bitcoin's over 90 paired days, 2026-07-21 to 2026-10-18: 1 moves in step, 0 unrelated, below 0 opposite

Daily return per 1% Bitcoin return over the same 90 days: covariance with Bitcoin's returns divided by the variance of Bitcoin's returns

The price change from 2026-07-20 to 2026-10-18 relative to Bitcoin's over the same days: (1 + coin change) / (1 + Bitcoin change) - 1