diff --git a/src/operations/category-chart.component.js b/src/operations/category-chart.component.js
index 65b2062..06f9f1d 100644
--- a/src/operations/category-chart.component.js
+++ b/src/operations/category-chart.component.js
@@ -53,17 +53,22 @@ var categoryChartModule = angular.module('categoryChartModule', [
                         expensesColor = 'orange';
 
                     angular.forEach(results, function(result) {
-                        var revenuesName = 'revenues-' + result.category;
 
-                        revenues.push([revenuesName, result.revenues]);
-                        names[revenuesName] = result.category;
-                        colors[revenuesName] = revenuesColor;
+                        if(result.revenues > 0) {
+                            var revenuesName = 'revenues-' + result.category;
 
-                        var expensesName = 'expenses-' + result.category;
+                            revenues.push([revenuesName, result.revenues]);
+                            names[revenuesName] = result.category;
+                            colors[revenuesName] = revenuesColor;
+                        }
 
-                        expenses.splice(0, 0, [expensesName, -result.expenses]);
-                        names[expensesName] = result.category;
-                        colors[expensesName] = expensesColor;
+                        if(result.expenses < 0) {
+                            var expensesName = 'expenses-' + result.category;
+
+                            expenses.splice(0, 0, [expensesName, -result.expenses]);
+                            names[expensesName] = result.category;
+                            colors[expensesName] = expensesColor;
+                        }
                     });
 
                     vm.chart.unload();