So if you're using a trail, there's two things you can check: you can check your voting history and see where you're voting relative to other voters, and you can check if the posts it's been voting on have received significant downvotes. For example, some of the trails might have been frontrunning bots, which now can be a bad strategy, as a lot of bot voted posts are downvoted if people don't agree with the rewards for the post.