Hi Tim, after the holidays, I return to work in the moodle module project. I've been trying to use an example "overview" file you told me, but with so much source code I can not see what exactly necessary for me to show a graph with values in the database. I'm still a novice in moodle, and I lost.
If you can, Tim, or any other help me with this I would appreciate it. Thank you very much friends.