If you are using the StockCharts.com platform you will find out that you can use Relative Rotation Graphs from a lot of different locations on the site. Directly from the home-page, from the sector summary page, from your chart-lists etc. etc.
You can also create your own RRG by manually adding ticker symbols to the input box on top of the chart. But which ticker symbols are you going to put there, and where can you find, for example, the constituents of an index if you would like to engage in some sector analysis on an individual stock level?
This blog article will help to get you going in setting up your ownRRGs holding individual stocks from a sector index for example.