First off, amazing stuff. I came to this thread to find this explanation. Thanks for writing it out. In case you're wondering, the first place I looked for t

First off, amazing stuff. I came to this thread to find this explanation. Thanks for writing it out. In case you're wondering, the first place I looked for the description was on the legend in the lower right, I expected something to be clickable that would tell me what a "deal" meant. You might want to place the explanation down there. Even a "title" attribute would be a quick win.