Hi Hwee,
Sorry for the delay in updating you.
I was able to understand your requirement and you could achieve the behavior in same graph by doing the following steps
1. Add another ChartAxes with OpposedPosition to the PrimaryAxes.
2. Then, set the Axes Label's CustomText by adding each point of the series and also we need to set the Axes Line color as Transparent.
I have illustrated the same in the below sample. Please take a look at the sample and let me know if it helps.
http://www.syncfusion.com/support/user/uploads/Sample_c0c1434f.zipThanks,
Srisubashini.