[jamooz]

Hello all!  Well, I am pretty new at this site, and am doing the looonnnnggg process of putting my cards in, etc... .   

My question though... while adding my cards, and searching cards etc... I notice 2 gray bars next to a card, or sometimes one is red and the other is green.  or sometimes they are half filled, etc...  I think you know what I mean.  So.... What are the bars and what do they represent??

Thanks!!