Hello Yasmeen,
If I understand it correctly, what you want is to generate a Qlik chart using data you have in your application but without using the app.getObject method.
If this is the case, you'll most likely find the Visualizations API very interesting, as it allows you to create visualizations on the fly without having to create them beforehand in your app.
https://help.qlik.com/en-US/sense-developer/3.2/Subsystems/APIs/Content/VisualizationAPI/Visualizati...
