Welcome to Agent Stats, agent
Install the android Agent Stats app from the Google play store or the iOS Agent Stats app from the App Store.
Open it and configure it to use your google account.
Inside Ingress: share your ALL TIME profile.
Open the Agent Stats app
Now go to your Agent Stats interface and see the graph appearing.
When you have more than 1 point, it will also guess when you'll get your next medals, your next levels...
If you want to share your stats with another agent, just add his agent name into your sharelist. If you're present in other agent's sharelist, then you will be able to click on his agent name and compare his stats with yours.