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Hello g-zakkour,

Thanks for the follow-up.

If your goal is for the date slicer itself to automatically change its selected value based on the Historical/Predicted slicer, then unfortunately this isn't supported in Power BI. DAX measures cannot programmatically set or update a slicer's selected value.

The approach I suggested is intended to provide the same report behavior rather than changing the slicer itself:

• Keep the date slicer available so users can manually override the date.
• Use an IsDefaultPeriod measure (or incorporate the logic into your measures) to display the latest historical date or TODAY() by default in the visuals.
• Once the user selects a different date, that selection naturally takes precedence.

If having the slicer automatically change is a hard requirement, the closest alternatives are:

• Separate Historical and Predicted report pages.
• Bookmarks with predefined slicer states.
• A custom navigation experience.

Could you clarify whether your requirement is:

1. The visuals should show the correct default period, or
2. The date slicer itself must automatically change its selected value?

That will help determine the best approach.

Best regards,
Omkar Shinde
Microsoft Fabric Enthusiast | Power BI Consultant

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