Standard DeviationSD
标准差
Stock TechnicalP2VolatilityApplies to: US stocks
Definition
The dispersion of price relative to its mean.
Formula
σ=√(Σ(Cᵢ−MA)²/n), n=20
How to read it
Rising σ = increasing volatility and rising risk.
InputscloseOutputoverlay/volatilityLibrarySTDDEV
Data source: C. Public knowledge, not investment advice.
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Reference metadata — public, well-known indicator definitions. Not investment advice.