Welcome, and thanks for visiting VIX Central.
* The quote data refreshes every minute
* Mouse over the points in the graph to obtain detailed information
* Click the the series' names in the legend to show or hide them
* For historical data, go to the tab and click on the date input field. After choosing the date, press the "Get Prices" button
* To see up to 20 dates on the same graph press the "Multiple Dates per Graph" button