Example
We want to graph the raw 30 minute price data for both New South Wales and Queensland between 1 September 2008 and 30 September 2008. The first thing we need to do is create a new Query by clicking on the New Query button. After putting in a name for the new Query (I've named mine "NSW & QLD RAW 30M Price 01092008 30092008" in the following examples), we see a blank form like the following:

The next step is to create a new Input to represent the raw data for Queensland. Click on the New Input button, and name the Input (I've named mine "QLD RAW 30M Price 01092008 30092008" in the following examples). You will now be able to see the plain-text interface to the Input.

The default values of raw, 30 minute price and Queensland are actually already correct in this case, but we'll need to change the dates. Click on the first date section, and a box will appear:

You can choose to enter your date directly into this box, or you can click on the small arrow to the right of the date and you will see the following date picker screen:

Use this screen to select 1 September 2008. Follow the same process for the second date section, except select 30 September 2008. The description for your input should now look like this:

Finally, hit the Calculate button to save the changes you've made to your Input, and to place it on the graph.

The next step, is to create an Input to represent the raw data for New South Wales. Do this in the same fashion as the Queensland Input above (In this example, I've named my input "NSW RAW 30M 01092008 30092008"). Make sure you change the region from the default value of Queensland to New South Wales, and change the dates as appropriate. When you're done, your Input should look like this:

Once again, click Calculate when you're done to save your changes and add the Input to the graph.

You should be able to see the two Inputs on the graph, which should look like this:

Thats all there is to it.