# Dynamic ranking with numeric parameters
The TopN feature can work with [Power BI numeric range parameters](https://learn.microsoft.com/en-us/power-bi/transform-model/desktop-what-if), enabling you to easily perform what-if analysis. You just need to adjust the ranking slider to apply TopN.
You can set up dynamic ranking in 2 simple steps:
**STEP 1:** Assign the Power BI numeric range parameter to the Tooltip categories visual parameter.
**STEP 2:** In the TopN configuration window, select *Measure* from the **By** dropdown. Select the numeric range parameter name from the **Measure** dropdown. In this case, we've named the parameter 'RankingSlider'.
Setting up dynamic ranking
Notice how the axis categories change in response to the slider changes. Only the top-performing categories are displayed based on their rank.
