diff --git a/core/NumberFormatter.php b/core/NumberFormatter.php
index <HASH>..<HASH> 100644
--- a/core/NumberFormatter.php
+++ b/core/NumberFormatter.php
@@ -160,7 +160,7 @@ class NumberFormatter extends Singleton
         $formatted = self::formatPercent($value);
 
         if($isPositiveEvolution) {
-            return '+' . $formatted;
+            return $this->symbolPlus . $formatted;
         }
         return $formatted;
     }
Use + sign from language, do not assume '+'