diff --git a/ADDING-NEW-CHART-TYPE.md b/ADDING-NEW-CHART-TYPE.md
index 8cc9bd6..393143d 100644
--- a/ADDING-NEW-CHART-TYPE.md
+++ b/ADDING-NEW-CHART-TYPE.md
@@ -20,6 +20,8 @@ var ChartList = {
 ```
 Make sure you add same key for `ChartList` in chart library factory.
 
+#### If chart Data Model is considerable different (Need to introduce new model for chart), If there is a huge differnt you can extend the factory (In Sub Library model)
+
 ##Build, Test and Run
  * `npm install` first, If you hav not run it before.
  * `bower install` will download new library for application.