Every number here is computed in your browser from a single file of daily closing prices — no per-chart data fetching. Correlation is the Pearson coefficient of daily returns over a rolling window you control; a value near +1 means two assets move in lockstep, near −1 means they move against each other. Beta is the rolling slope of an asset's returns against a chosen base (Bitcoin by default). Volatility is the annualized standard deviation of daily returns.
Prices go back as far as each asset trades freely — up to two decades — aligned to a shared business-day calendar so crypto and equities are compared on the same trading days. Newer assets simply start later; each chart trims to where its data exists. Windows are measured in trading days.
Open source: github.com/josusanmartin/correlations