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A volatility estimator that uses open, high, low, and close prices (not just closes). Captures both intraday range and overnight gaps for more accurate volatility measurement.
⚡ KEY TAKEAWAY: More accurate than close-to-close — VolRadar uses it on ticker pages so you see true stock movement, not just closing price changes.
Implied Volatility (IV)
Higher IV = more premium to collect when selling options. But also more risk if the stock moves.
Realized Volatility (RV)
When RV is lower than IV, options are overpriced relative to actual movement — the core edge for sellers.
IV Rank
IV Rank > 50 = premiums elevated, good for selling. Below 30 = cheap, consider waiting.
IV Percentile
IV Percentile 80 = IV was lower than today 80% of the time. High percentile confirms elevated premiums.