Hi Jesse Turner and Swapnil Shinde.
I'm assuming you're setting these properties in the OnInitialize event of the screen, but you are missing the 'reference' to those properties.
Create a local variable of the AdvancedFormat type and assign the output of the _init action to that variable.


Then, in the Chart properties, set the variables as the source:

This should do the trick
Hope it helps.
Cheers