Time Frame: Short-Term | Update Schedule: Daily | Source: SentimenTrader
Construction:
20-Day Historical Volatility measures price dispersion over a 20-Day window.
What High/Low Volatility Means:
Calculation: StdDev(ln(Pt/Pt-1), window) × √252 × 100.
Use Case: Compare this value to the S&P 500 (SPX) volatility. If the ratio (Relative Volatility) is > 2.0, the stock is experiencing abnormal risk levels compared to the broad market.