I believe I can request a full service broker to carry out any part of my trade (buy or sell) as Anon, without any added cost directly or indirectly. And think, even if I do not make such a request, the savvy full service trader may do that anyway simply to make it appear the selling or buying, even as part of one large order, is not coming from one single source. I think trying to interpret anon trades just muddies the waters, which is why I suspect they are there in the first place.That is my understanding and would be happy to be informed if there is any more to it than that.