Historical Volatility (Parkinson) (10-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.

CrowdStrike (CRWD) had 10-Day Historical Volatility (Parkinson) of 0.3026 for 2025-08-01.

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Over 300 data fields encompassing historical volatility, implied volatility, and put-call ratios for multiple time frames
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Figures for 2025-08-01

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2083
Historical Volatility (Parkinson)	0.3026
Implied Volatility (Calls)	0.3962
Implied Volatility (Puts)	0.3960
Implied Volatility (Mean)	0.3961
Put-Call Implied Volatility Ratio	0.9993
Implied Volatility Skew	0.0605
Option Statistics
Put-Call Ratio (Volume)	0.6664
Put-Call Ratio (Open Interest)	0.9599