Hi Megan Brown,
Thanks for using Syncfusion products.
We have analyzed your reported query and found that the images attached in the forum are not uploaded properly and we are not able to view them, so we find difficulty in understanding your way of binding datasource to rangenavigator. However we have prepared a simple sample by using NORTHWNDEntitiesData as a primary database file and connected rangenavigator. In which we are using Orders table to render chart.
Please find below sample and you can download it from below link
If this is not your requirements please revert us back by modifying the sample, it will help us to serve you better.