Hi,
I have a sample data, as below, How do I build Trend Link within cell in Power BI.
https://learn.microsoft.com/en-us/power-bi/create-reports/power-bi-sparklines-tables
Hopefully you can also see how you need to transform your data from this.
I'm no powerbi expert, but does this help?
How to add a Trend Line to Visuals in Power BI (popautomation.com)
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