Wanted to announce that I just submitted a pull request for v2.0 of my goldpriceticker Tidbyt app.
This new version now adds 30 day, 90 day, and 1 year charts for the available precious metals. This can be selected using the Graph Period option within the app.
The 1 year chart does not have an entire year of data yet, but it will grow as my backend api database continues to grab prices.