Stock Price History Help

Last updated October 28, 2026

Price History displays historical prices for up to 90 days. The implied volatility is also shown.

Select a time period from one of the following options:

1 Week 1 Month 2 Months 3 Months

For options, the following Greeks can be charted:

Delta - how much the option price will change for each $1 move in the underlying. Gamma - the rate at which the option price changes as delta changes Vega - how the option price changes relative to volatility Rho - how much the option price will change when the interest rate changes Theta - the rate at which the option price declines as time passes

The Price History feature shows historical prices for stocks, indexes, ETFs, and options.

Trade Date - date the security last traded. Last Price - the last trade price.

For options: Theoretical Price - price derived using the historical volatility of the underlying stock or index. Charted Price - the split between the bid and ask.

For options, the Greeks can be charted along with the option price. The chart uses the split between the bid and the ask as the price.

The following Greeks can be charted:

The history of implied volatility shows how expensive options were over the selected price history. This is useful for determining the relative price of options, and can help decide when to buy an option (when it's cheap), or sell an option (when it's expensive).