diff --git a/TODO.md b/TODO.md
index 9f652acf3..6d900d8d9 100644
--- a/TODO.md
+++ b/TODO.md
@@ -12,12 +12,10 @@ List of TODO items for Panoramix
 * in/notin filters autocomplete
 
 ## First Class Line Charts
-* Contribution to total
+* Contribution to total (added to line chart already)
 * Time comparison
 * Time ratios
 * Use legend shapes that match line markers (useful?)
-* Hover line highlighting
-* More colors! the Airbnb palette is currently pretty limited
 * Line types (dash, dotted)
 
 ## New Features
diff --git a/panoramix/forms.py b/panoramix/forms.py
index f8828caa9..5185ff083 100644
--- a/panoramix/forms.py
+++ b/panoramix/forms.py
@@ -135,6 +135,9 @@ def form_factory(viz):
         'donut': BooleanField(
             "Donut", default=False,
             description="Do you want a donut or a pie?"),
+        'contribution': BooleanField(
+            "Contribution", default=False,
+            description="Compute the contribution to the total"),
     }
     field_css_classes = {k: ['form-control'] for k in px_form_fields.keys()}
     select2 = [
diff --git a/panoramix/templates/panoramix/viz_nvd3.html b/panoramix/templates/panoramix/viz_nvd3.html
index d36f36373..741b740b6 100644
--- a/panoramix/templates/panoramix/viz_nvd3.html
+++ b/panoramix/templates/panoramix/viz_nvd3.html
@@ -53,6 +53,9 @@
               .tickFormat(function (d) {return tickMultiFormat(new Date(d)); });
             chart.showLegend({{ "{}".format(viz.args.show_legend=='y')|lower }});
             chart.yAxis.tickFormat(d3.format('.3s'));
+            {% if viz.args.contribution=='y' %}
+              chart.yAxis.tickFormat(d3.format('.3p'));
+            {% endif %}
 
           {% elif viz.chart_type == 'nvd3_bar' %}
             var chart = nv.models.multiBarChart()
@@ -74,7 +77,9 @@
             chart.cornerRadius(true);
 
           {% elif viz.chart_type == 'column' %}
-            var chart = nv.models.multiBarChart();
+            var chart = nv.models.multiBarChart()
+              .reduceXTicks(false)
+              .rotateLabels(45) ;
             chart.yAxis.tickFormat(d3.format('.3s'));
 
           {% elif viz.chart_type == 'compare' %}
@@ -104,7 +109,7 @@
 
           {% endif %}
 
-          {% if viz.chart_type == "nvd3_line" and viz.args.rich_tooltip == 'y' %}
+          {% if viz.chart_type in ("line", "stacked") and viz.args.rich_tooltip == 'y' %}
             chart.useInteractiveGuideline(true);
           {% endif %}
           {% if viz.args.y_axis_zero == 'y' %}
diff --git a/panoramix/utils.py b/panoramix/utils.py
index 48531cd91..73ec16f00 100644
--- a/panoramix/utils.py
+++ b/panoramix/utils.py
@@ -89,8 +89,10 @@ def color(s):
     '#FF5A5F'
     """
     colors = [
-      "#FF5A5F", "#007A87", "#7B0051", "#00D1C1", "#8CE071", "#FFB400",
-      "#FFAA91", "#B4A76C", "#9CA299", "#565A5C"
+        "#FF5A5F", "#007A87", "#7B0051", "#00D1C1", "#8CE071", "#FFB400",
+        "#FFAA91", "#B4A76C", "#9CA299", "#565A5C",
+        "#A14D83", "#4FA3AB", "#4EDED2", "#4EDED2", "#FFCA4F", "#FFC4B3",
+        "#C9BF97", "#C9BF97", "#898C8C",
     ]
     h = hashlib.md5(s)
     i = int(h.hexdigest(), 16)
diff --git a/panoramix/viz.py b/panoramix/viz.py
index 117c3d9cc..0799e8038 100644
--- a/panoramix/viz.py
+++ b/panoramix/viz.py
@@ -315,6 +315,7 @@ class BigNumberViz(BaseViz):
 class NVD3TimeSeriesViz(NVD3Viz):
     verbose_name = "Time Series - Line Chart"
     chart_type = "nvd3_line"
+    sort_series = False
     form_fields = [
         'viz_type',
         'granularity', ('since', 'until'),
@@ -323,18 +324,28 @@ class NVD3TimeSeriesViz(NVD3Viz):
         ('rolling_type', 'rolling_periods'),
         ('show_brush', 'show_legend'),
         ('rich_tooltip', 'y_axis_zero'),
-        ('y_log_scale', None)
+        ('y_log_scale', 'contribution')
     ]
 
     def get_df(self):
         args = self.args
         df = super(NVD3TimeSeriesViz, self).get_df()
+        df = df.fillna(0)
         metrics = self.metrics
         df = df.pivot_table(
             index="timestamp",
             columns=self.groupby,
             values=metrics,)
 
+        if self.sort_series:
+            dfs = df.sum()
+            dfs.sort(ascending=False)
+            df = df[dfs.index]
+
+        if self.args.get("contribution") == "y":
+            dft = df.T
+            df = (dft / dft.sum()).T
+
         rolling_periods = args.get("rolling_periods")
         rolling_type = args.get("rolling_type")
         if rolling_periods and rolling_type:
@@ -348,10 +359,10 @@ class NVD3TimeSeriesViz(NVD3Viz):
 
     def get_json(self):
         df = self.get_df()
-        df = df.fillna(0)
         series = df.to_dict('series')
         datas = []
-        for name, ys in series.items():
+        for name in df.T.index.tolist():
+            ys = series[name]
             if df[name].dtype.kind not in "biufc":
                 continue
             df['timestamp'] = pd.to_datetime(df.index, utc=False)
@@ -401,12 +412,14 @@ class NVD3CompareTimeSeriesViz(NVD3TimeSeriesViz):
 class NVD3TimeSeriesStackedViz(NVD3TimeSeriesViz):
     verbose_name = "Time Series - Stacked"
     chart_type = "stacked"
+    sort_series = True
     form_fields = [
         'viz_type',
         'granularity', ('since', 'until'),
         'metrics',
         'groupby', 'limit',
         ('rolling_type', 'rolling_periods'),
+        ('rich_tooltip', 'show_legend'),
     ]
 
 
@@ -447,7 +460,7 @@ class DistributionBarViz(DistributionPieViz):
     chart_type = "column"
 
     def get_df(self):
-        df = super(DistributionBarViz, self).get_df()
+        df = super(DistributionPieViz, self).get_df()
         df = df.pivot_table(
             index=self.groupby,
             values=self.metrics)
@@ -482,7 +495,6 @@ class DistributionBarViz(DistributionPieViz):
 viz_types = OrderedDict([
     ['table', TableViz],
     ['line', NVD3TimeSeriesViz],
-    ['big_number', BigNumberViz],
     ['compare', NVD3CompareTimeSeriesViz],
     ['area', NVD3TimeSeriesStackedViz],
     ['bar', NVD3TimeSeriesBarViz],
@@ -491,4 +503,5 @@ viz_types = OrderedDict([
     ['bubble', BubbleViz],
     ['markup', MarkupViz],
     ['word_cloud', WordCloudViz],
+    ['big_number', BigNumberViz],
 ])