             return @
 
         @act_histogram = []
+        max_score = @avg_bin_score + 20
 
         data_idx = 0
         while data_idx < score_list.length

            column = [ time, score ]
            @act_histogram.push column

            data_idx += 1

        colors = ["#00c0c0"]


            yaxis:
                show: false
                max: max_score

            grid:
                markings: [
