There are lots of things you can do with this application. The first thing I might suggest is giving users the capability to make the data appear to have fewer and greater fluctuations so that you can show how statistics can be manipulated to make almost any point. I would also suggest using another database for something such as average temperature.
In this chapter, you've learned how to use the Graph2D class for a more advanced application. You've also learned about disconnected datasets and why you'd want to use them. And you've learned how to adjust data for specific needs.