diff --git a/lib/git_stats/git_data/repo.rb b/lib/git_stats/git_data/repo.rb
index 32c7c25d7..657ef58b0 100644
--- a/lib/git_stats/git_data/repo.rb
+++ b/lib/git_stats/git_data/repo.rb
@@ -37,16 +37,16 @@ module GitStats
         commits.map(&:date).minmax
       end
 
-      def commits_count_by_author
-        Hash[authors.map { |author| [author, author.commits.size] }.sort_by { |author, commits| -commits }[0..5]]
+      def commits_count_by_author(limit = 4)
+        Hash[authors.map { |author| [author, author.commits.size] }.sort_by { |author, commits| -commits }[0..limit]]
       end
 
-      def lines_added_by_author
-        Hash[authors.map { |author| [author, author.lines_added] }.sort_by { |author, lines| -lines }[0..5]]
+      def lines_added_by_author(limit = 4)
+        Hash[authors.map { |author| [author, author.lines_added] }.sort_by { |author, lines| -lines }[0..limit]]
       end
 
-      def lines_deleted_by_author
-        Hash[authors.map { |author| [author, author.lines_deleted] }.sort_by { |author, lines| -lines }[0..5]]
+      def lines_deleted_by_author(limit = 4)
+        Hash[authors.map { |author| [author, author.lines_deleted] }.sort_by { |author, lines| -lines }[0..limit]]
       end
 
       def files_count_by_date
diff --git a/lib/git_stats/stats_view/charts/authors_charts.rb b/lib/git_stats/stats_view/charts/authors_charts.rb
index 791ac749a..c2c1488f9 100644
--- a/lib/git_stats/stats_view/charts/authors_charts.rb
+++ b/lib/git_stats/stats_view/charts/authors_charts.rb
@@ -6,30 +6,30 @@ module GitStats
           @authors = authors
         end
 
-        def commits_sum_by_author_by_date
+        def commits_sum_by_author_by_date(limit = 4)
           Chart.new do |f|
             f.multi_date_chart(
-                data: @authors.sort_by { |author| -author.commits.size }[0..5].map { |author| {name: author.email, data: author.commits_sum_by_date} },
+                data: @authors.sort_by { |author| -author.commits.size }[0..limit].map { |author| {name: author.email, data: author.commits_sum_by_date} },
                 title: :lines_by_date.t,
                 y_text: :lines.t
             )
           end
         end
 
-        def lines_added_by_author_by_date
+        def lines_added_by_author_by_date(limit = 4)
           Chart.new do |f|
             f.multi_date_chart(
-                data: @authors.sort_by { |author| -author.lines_added }[0..5].map { |author| {name: author.email, data: author.lines_added_by_date} },
+                data: @authors.sort_by { |author| -author.lines_added }[0..limit].map { |author| {name: author.email, data: author.lines_added_by_date} },
                 title: :lines_by_date.t,
                 y_text: :lines.t
             )
           end
         end
 
-        def lines_deleted_by_author_by_date
+        def lines_deleted_by_author_by_date(limit = 4)
           Chart.new do |f|
             f.multi_date_chart(
-                data: @authors.sort_by { |author| -author.lines_deleted }[0..5].map { |author| {name: author.email, data: author.lines_deleted_by_date} },
+                data: @authors.sort_by { |author| -author.lines_deleted }[0..limit].map { |author| {name: author.email, data: author.lines_deleted_by_date} },
                 title: :lines_by_date.t,
                 y_text: :lines.t
             )
diff --git a/lib/git_stats/stats_view/charts/chart.rb b/lib/git_stats/stats_view/charts/chart.rb
index e382a9ddb..340cbf7a6 100644
--- a/lib/git_stats/stats_view/charts/chart.rb
+++ b/lib/git_stats/stats_view/charts/chart.rb
@@ -43,6 +43,7 @@ module GitStats
 
         def multi_date_chart(params)
           common_options(params)
+          default_legend
           params[:data].each do |s|
             series(
                 name: s[:name],
@@ -60,6 +61,7 @@ module GitStats
 
         def default_legend
           legend(
+              enabled: true,
               layout: 'vertical',
               backgroundColor: '#FFFFFF',
               align: 'left',