If it's not genuinely indicative of trading experience, what's the point? Especially if, as cv has said, it is based purely on post count. We already have that data on every post a member makes.
timsk drew my attention to the reputation system and I can see the data on my profile, but it doesn't seem to feature anywhere else on the site. Perhaps that could be used in some meaningful way with the value of reputation displayed in the place of what appears to be a somewhat redundant member status? It would certainly carry more weight as would be a genuine reflection of peer rating. Presumably the current values each member has are already indicative and flipping to a system based on that would be an immediate improvement using the data already available. The only system change would be to change member status for reputation status. Hope you don't object to a new member voicing an opinion.