Topic: Optionslam.com Options Volatility Chart

Blue Bar:

This is the maximum price movement from the opening price on Options month start date to the highest high or lowest low during the options month.

Yellow Bar:

This is the final price movement from the opening price on Options month start date to the closing price on Options month expire date.

Grey Shadow:

Shadow size is the absolute value of the final price movement of each Options month. This shadow trend line presents the volatility change for last 12 months.
Below is the example chart to show the volatility changes in last 12 months,