Discovered this website the other day which provides the realtime USD Index … I was using INO but this site IMO is much more superior … you will need to possibly make a minor adjustment in order to view the USD Index if this link provided does not take you directly to the chart … in order to view the USD Index chart just follow these instructions:

To View a Live USD Index Chart
1) Click “File”
2) Click “Change Symbol”
3) Click “More”
4) A tiny pop-up window appears, type in  USD/INX

Once there, click on the drop down menus above the chart for various other additional options such as adding indicators and changing the time scale and period as examples.

http://www.global-view.com/forex-trading-tools/usindex_charts.html

Always a good idea to have more than one or two websites in case one fails.