You can see a history of resource and network usage using this section.
You can adjust the time frame of the usage graphs in the top right of the screen. This will allow you to change it from as long as a year back to as short as the hour.
Resources
The resources usage page will show you a history of CPU, Memory, and Disk IO for your specific VPS service.
Network Traffic
The network usage page will show you how much network traffic you are using on a time scale.
