Historical Volatility (Parkinson) (20-Day)
Historical Volatility (Parkinson): The past volatility of the security over the selected time frame, calculated using the high and low prices on each trading day.
Tradr 2X Long OPEN Daily ETF (OPEX) had 20-Day Historical Volatility (Parkinson) of 1.5499 for 2026-02-20.
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