# Tag Info

As volatility has a great influence on option prices, you'd like to sell options in high volatility environments and purchase options in moments of low volatility. But what is high/low volatility? Implied volatility rank (IVR) and implied volatility percentile (IVP) tell you this. The implied volatility rank is given by $$IVR=\frac{IV-52Low}{52High-52Low},$$...