Volatility come in two types, namely:
1. Historic volatility: this is the yearly standard deviation of a product’s price. The more it goes up and down in price, the higher the measure of volatility becomes.
2. Implied volatility: since volatility is a measure of risk, it is used to input models to price options. Therefore if the option pricing formula is reworked, you can calculate the volatility from an option’s market price.