Re: Measuring Page Conversion Rates

It looks like I can get fairly close to measuring conversion rate per page by using custom variables. At the moment I track form submissions and shares something like this:

_paq.push(['setCustomVariable', 3, 'Shares', 'Twitter', 'page']);
_paq.push(['trackPageView']);

or
_paq.push(['setCustomVariable', 4, 'Events', 'New Subscription, 'page']);
_paq.push(['trackPageView']);

Then I can segment the data to see only views with shares or events attached. This gives me aggregate data but I'm wondering if there is an easy way to get Piwik to show this as a conversion ratio. Something like

Actions with Shares variable / Actions without Shares variable

or more accurately

Actions with Shares variable / (Actions without Shares variable - Actions with Shares variable)

Ideas?