The mood tracker is now available. Go to My MedHelp and click on the Trackers Tab. If you don't have any trackers, you'll see a list of all available Trackers. If you already have trackers, click on the Trackers icon on the right of the toolbar and you'll see a list of trackers you can add.
Thanks for the suggestion and please let us know if you have any enhancement requests.
A mood tracker is definitely on our list of features to add. We'll let you know when it's available. Thanks for the suggestion!