Trends - unique open and click rates for emails

In trends->emails, all data that I can see are overall data, not unique data. So when I send 1 email and the person opens it 5 times, I will see 5 opens. In message stats (https://app.ontraport.com/#!/contact/messages), I can see unique open and click rates, which is great. But I cannot specify a time period this is for.

What I would like to achieve is a unique open and click rate for all emails, and all contacts for the account. 

Can you add a switch to trends to be able to select if the data displayed are overall or unique (once per event)?

Thank you,

Jan