Tried searching but couldn't find anything. I'm sure this must be simple, but how do you set up your smart campaign to track which articles are opened???
Make sure to post your questions to Products. A mod just moved your thread today.
Smart Campaigns don't really track rates -- that's more the reporting side.
Your goal isn't totally clear, but you may want to [a] constrain your Clicked Link in Email activities by URL or ID (I like using ID) or [b] add an Interesting Moment based on {{trigger.link}}.
You can find that information in the Email Link Performance report if you sent that newsletter out in as an email. It will track both unique people and number of clicks.