Add winrate in match history

I think it would be really nice to see my winrate in all my matches with my secected filters. Like if I go to my match history with Kindred http://matchhistory.eune.leagueoflegends.com/en/#match-history/EUN1/217701433?champion=203 there would be my winrate with Kindred in all normals and rankeds. Isn't it super simple to do? Make program count all games and then all wins? We don't have anything like that yet and it would be nice to see winrate on normals too. I know that for rankeds we have op.gg but nothing to show winrate in aram or normals.