I have membership and over 200 points in an increasing number (>12) of Stack Exchange sites.

I like the graph that shows all the various lines for each different site -  
<http://stackexchange.com/users/315778/michael-durrant?tab=reputation>

But I would like an option to see the line for the *cumulative* total score (so not "<http://meta.stackoverflow.com/questions/86089/new-reputation-graph-line-chart-option>" - at least not the _answer_ given).  

My Stack Overflow score line is at a fairly constant angle but it would be fun to see an _overall_ total *line* which would be much more upward curved and additional motivation to use the site.

I tried the suggestion in Chrome in developer mode but can't select my script - it's grayed out (below)
![enter image description here][1]


  [1]: https://i.sstatic.net/kKfoU.png