Is a stock calm or coiled? See realized volatility across every horizon with its historical percentile bands and today's reading - the "vol cone" desks use to judge whether options are cheap or rich - plus the vol term structure and return distribution. Five years of daily data, free.
Realized (historical) volatility from up to ~5 years of daily closes, annualized. The cone shows the distribution of past realized vol at each horizon; the marker is today's reading. High vs its own history = options relatively rich; low = relatively cheap. Educational only - not investment advice.