LJP, you've clarified what I feel as well about "fashion forward" vs trending:
"What constitutes "fashion forward" is obviously different for all of us. I've always used it and understood it to mean something that pushes the boundaries or moves a look forward. (as opposed to something currently trending)."
I enjoy pushing the boundaries. Though I've been enjoying baggier pants for a few years now, I've just purchased a pair of VERY voluminous cotton pants which feels quite forward for me. When I saw them online there was this feeling inside, "Ohh....that's what I've been looking for!". And when I put them on, it was a lot of "I love these!" and a little tiny bit of that feeling, "Can I really wear these??" Yes, I will! I think those inside feelings are what connect me to a "forward" creative sense.
I find forward is more about stretching, entering into new territory...new shapes or colors or textures...where as trendy is more following or thinking it has to adhere to a certain rule or something. Though of course it's "trending", though perhaps fringe, otherwise it wouldn't even be for sale. right? After all, I'm not sewing my own clothes .