This plugin let you customize reports including graphs and download them as pdf.
At time version is 0.0.1_a and many functions are not implemented yet.
But, regarding the built-in pdf plugin, this plugin gives you the option to get the evolution over the last few days as graph.
Keywords: pdf export
Attachment: plugin files including pChart-framework
Attachment: Example of pdf with tables and graphs
Attachment: new PdfExportToll Src
New version of plugin makes now use of exported drawing code into ImageGraph Module (#1721)
update: You can now save your settings.
Why is the graphs images? It does not look good. Why not render them as vector?