Interesting presentation. I'm really intrigued by this display.
Just to make certain that I understand it. ASS SPORTIVE DE MONACO (Blue line on upper left of top chart) is undefeated and didn't play on day 8 and VOLLEY-BALL STADE LAURENTIN didn't win it's first game (or get its first point) until day 6 and hasn't won since.
I'm not certain that this graph type can be much improved on unless you allow users to remove teams from the graph.
Looking at the second graph I wonder if I truly understand the underlining metrics (unless it's like American Sports where an Eastern Conference or Division plays other Conferences.
I look at (and create) charts all day and I find your charts somewhat overwhelming (at first glance). I can see it working very well with a few teams but it doesn't scale well. If you can't allow users to remove and add teams then I wonder if this presentation will work.
EXAMPLE: user starts with "his" team (assuming logged in and selected) and the league average. Two lines are very easy to work with. And then he can add other teams (best, worst, best over last X games, his conference, etc...)
What other chart types have you looked at?
I think this is an excellent attempt in showing relative ranking over time however I don’t think this scales well. It is difficult to find 10+ different colors that stands out against every other color. For instance the lower right (day 5 – day 9) is difficult to read at a glance. I had to focus on the graph to distinguish that which line represented Olympiques Antibes Juan Pins. I think this works well in showing the relative standings over time of two team, maybe a 3 or 4, but I don’t think it’s working well at 10.
What do your users want? Will your users want to put in the energy to compare all these teams? I know my users wouldn’t.
The purpose of graphs is to make absorbing data quick and easy; as well as reducing complexity and ambiguity. I think this is an excellent idea but that it doesn’t scale well.
This doesn’t mean that it shouldn’t be used – only that its use ought to be limited to where it improves the readers ability to absorb information.
I see this working well, for instance, where you compare a team to its previous year’s pace. This year could be in red, last year in black, the year before in dark gray, etc…. There are an infinite variations on a theme that can go here especially if the team is close to a record pace and you show this year’s point total with the record total. In that above example multiple lines work because this year's line would be a very different color and will be incomplete - hence will stand out. The other lines would be historical, not change over time, and will be "background" information.
To recap and answering your question: I think this a great design for showing total points over time but that it doesn't scale well. The solution is to use it where it’s appropriate and not force it where it’s not.