The problem with traffic trading scripts that many that track by referrer see
Code:
https://your-domain.com
as a different site than
Code:
http://your-domain.com
The coding changes would need to occur in the script at the incoming end, in addition to adding the Meta code to the sending https page. Since your trade partners are likely using a variety of different tracking scripts, many of them no longer updated, this simply isn't going to happen for the most part.
I've been looking for a solution for over a year with zero success.