DVOL
What it measures
Deribit's BTC volatility index - the options market's forward-looking (implied) expectation of future volatility, derived from a wide range of listed option prices.
Formula
A third-party index (Deribit), analogous in spirit to the VIX for equities.
Normal range
Varies with market conditions; read via its own historical percentile on the Flows page rather than a fixed threshold.
How it fails
Implied volatility is priced by options traders' expectations, not a measurement of what volatility will actually turn out to be - it can be persistently higher or lower than subsequent realized volatility depending on how option supply/demand is positioned.
Related metrics
Realized Volatility, Put/Call Skew
Bull read
Low DVOL alongside a bullish price trend suggests the options market isn't pricing much near-term turbulence.
Bear read
Low implied volatility does not prevent a sudden realized move - it only reflects what the options market currently expects, not a guarantee.