Try to develop sample application with sample data according to requirement.
Once the sample application satisfies then integrate it in many application.
Step2:
First try to develop the graph charts in Straight table. B'coz in straight table you can see the data of expression what you have taken. Once it is satisified with your requirement then convert that chart to graphical chart.
If you are working on button actions, selections on chart, If you want to see whether it is selected or not .In this cases better to take Current Selection box to see the results of selections.
If you are develping the set analysis script in the chart and if you are facing any problem with set analysis. Better to hard code the set analysis and change the code later once you see the result what you need.
