Add new metric or new report in Ecommerce part


Is it possible to add a custome metric or a custom report in the Ecommerce page ?

In fact, i want to have a report about add to basket conversion. I don’t want to add a new goal because i can define my metrics with abandonnedCart metric and ecommerceOrder metric.

How can i do that ?

Or, more general way, is it possible to extend the Ecommerce & goals plugin with another specific plugin to extend functionnalities ?