It’s been hashed out before and old feedback system isn’t coming 
unless someone writes a Discourse plugin for it, even then I’m not sure if the hosted version of Discourse that YYE uses can install plugins. The data and tables exist since the old feedback was imported but beyond that Discourse isn’t interested.
https://forums.yoyoexpert.com/t/trade-stats-from-the-old-forum-are-back/296498
(one of the more frustrating threads I’ve read…)
Year and a half later and still not even pinning a trade feedback thread to your profile. Makes me miss SMF.