Exclude specific tracker

Hello,

Is there a way to add a filter to project stats. I would like to exclude one specific tracker:
    I found in your code "app/views/projects/blocks/_issues_opened_closed.html.erb" that you use filters. Is there something that i can add like:
    `queryopened.add_filter "tracker_id", "!=", ...`

Or even better maybe some new options to spit open-closed per tracker. 

Thank you.