[Plugin: Tally Graph] Single post, multiple values?

Hi Dylan. Firstly, thanks for this plug-in. I appreciate the effort you’ve put into it.

I’ve already got TallyGraph working, but I’m wanting to track stat changes on a daily basis; so spawning each value using a new post is impractical.

Obviously the issue lies with WordPress itself; as the date is associated with the post, not stored with the custom value (wp_postsmeta).

Ideally, I think it’d be best to have a new/separate table that’s populated with WordPress values; along the lines of:
cf_id, post_id, post_date meta_key and meta_value.

I was just wondering if you had come across a plug-in that does this sort of thing already, or if this was something you were looking to add in the future?

http://wordpress.org/extend/plugins/tally-graph/