Revit Schedule to Excel Bidirectional link

Could you send a screenshot of your graph?
See here for reading from excel spreadsheet:
http://dictionary.dynamobim.com/#/Office/Excel/Action/ReadFromFile
Try also to type your keywords in the search tool, it helps to see if any appropriate answer has not been given already:
https://forum.dynamobim.com/search?q=get%20values%20from%20excel

Lastly, you could want to read the forum guidelines if you did not yet: