It may exist already and I just cant figure it out(quiet possible),but, ...I currently invest in a couple of stocks. I'm trying to figure out which stocks currently and historically have the best dividend/cost ratio without just buying a share of each and waiting. I am using btct.co but would be interested in any relevant exchanges that have a way to see this info.
I've found that all exchanges have a way to view this. At btct.co, go to the page of the security you want to investigate then select the "History" tab.