score:2

1) You can set for series only one color. Here:

         $.each(names, function(i, name) {
                  seriesOptions[i] = {
                     name: name,
                     step: true,
                     data: data[i],
                     color: 'yourColor'                        
                   };
         ...
         });

2) In tooltip, you have access to series via this.points[0].series.data etc. So you can get all points.

3) Scroll is not supported.


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