diff --git a/caravel/assets/visualizations/nvd3_vis.js b/caravel/assets/visualizations/nvd3_vis.js
index ba205ab3a112b..c8db32887d5d9 100644
--- a/caravel/assets/visualizations/nvd3_vis.js
+++ b/caravel/assets/visualizations/nvd3_vis.js
@@ -16,8 +16,14 @@ function nvd3Vis(slice) {
   var render = function () {
     d3.json(slice.jsonEndpoint(), function (error, payload) {
       var width = slice.width();
+      var fd = payload.form_data;
       var barchartWidth = function () {
-        var bars = d3.sum(payload.data, function (d) { return d.values.length; });
+        var bars;
+        if (fd.bar_stacked) {
+          bars = d3.max(payload.data, function (d) { return d.values.length; });
+        } else {
+          bars = d3.sum(payload.data, function (d) { return d.values.length; });
+        }
         if (bars * minBarWidth > width) {
           return bars * minBarWidth;
         } else {
@@ -33,7 +39,6 @@ function nvd3Vis(slice) {
         }
         return '';
       }
-      var fd = payload.form_data;
       var viz_type = fd.viz_type;
       var f = d3.format('.3s');
       var reduceXTicks = fd.reduce_x_ticks || false;
@@ -61,7 +66,7 @@ function nvd3Vis(slice) {
 
           case 'bar':
             chart = nv.models.multiBarChart()
-            .showControls(true)
+            .showControls(false)
             .groupSpacing(0.1);
 
             if (!reduceXTicks) {
@@ -77,7 +82,7 @@ function nvd3Vis(slice) {
 
           case 'dist_bar':
             chart = nv.models.multiBarChart()
-            .showControls(true) //Allow user to switch between 'Grouped' and 'Stacked' mode.
+            .showControls(false) //Allow user to switch between 'Grouped' and 'Stacked' mode.
             .reduceXTicks(reduceXTicks)
             .rotateLabels(45)
             .groupSpacing(0.1); //Distance between each group of bars.
diff --git a/caravel/forms.py b/caravel/forms.py
index 97a833e9f78c2..cddd475e84937 100644
--- a/caravel/forms.py
+++ b/caravel/forms.py
@@ -228,7 +228,7 @@ def __init__(self, viz):
             'reduce_x_ticks': (BetterBooleanField, {
                 "label": _("Reduce X ticks"),
                 "default": False,
-                "description": (
+                "description": _(
                     "Reduces the number of X axis ticks to be rendered. "
                     "If true, the x axis wont overflow and labels may be "
                     "missing. If false, a minimum width will be applied "
diff --git a/caravel/viz.py b/caravel/viz.py
index c8e4d3b429569..5ae423bcfc0e1 100644
--- a/caravel/viz.py
+++ b/caravel/viz.py
@@ -1159,7 +1159,7 @@ class DistributionBarViz(DistributionPieViz):
             ('show_legend', 'bar_stacked'),
             ('y_axis_format', 'bottom_margin'),
             ('x_axis_label', 'y_axis_label'),
-            ('reduce_x_ticks', None),
+            ('reduce_x_ticks', 'contribution'),
         )
     },)
     form_overrides = {
@@ -1198,6 +1198,10 @@ def get_df(self, query_obj=None):
             index=self.groupby,
             columns=columns,
             values=self.metrics)
+        if fd.get("contribution"):
+            pt = pt.fillna(0)
+            pt = pt.T
+            pt = (pt / pt.sum()).T
         pt = pt.reindex(row.index)
         return pt