As it is now, It seems to show notes, calls, tasks, emails.
I've not done it but I believe it can, with a little work.
There is a Historical Summary Plugin on GitHub:
These 2 free Sugar 7 plugins are going to make history « Sugar Developer Blog – SugarCRM
The code is here: geraldclark/HistoricalSummary · GitHub
You should then be able to edit your custom/clients/base/api/CustomHistorySummaryAPI.php
to add Opportunities to your results
Thank you for the quick reply. I should have included that I have an ONDEMAND instance. Am I still able to make a change?
Sorry, I don't know what the limitations of OnDemand are. We are On Site.
It shouldn't be a problem, so long as your PHP code modifications don't violate any of the Package Scanner restrictions (i.e. use disallowed methods). See here for Package Scanner restrictions:
Retrieving data ...