Dashboard - Creating Indicator

[p1ragg]

I'm quite new to the GIS world and recently my company bought Arcgis Enterprise. Since I work with power b.i dashboards I'v been responsible to transfer some works to Arcgis Dashboards and among other struggles I have been struggling with indicators.
I have two point layers one of them has points for every tree on the area while the other layer has points to every space where a tree is missing .
From these 2 layers I want to create an indicator showing the percentage of the spots that we could put new trees, based on the count of lines(points) on both layers https://19216801.onl/ .

I can't get to acess these two layers in the same indicator but recently I found out about Arcade expressions and it seemed to me the only way to get this done.

So far I've written this expression, but can't use it on indicator. Any tips on how the fix this expression or do this in another way ?

*Sorry for bad english.

[berniejconnors]

Put all the points in one layer. Some points are occupied by an existing tree and some points are unoccupied. There is no need to separate these points into two layers. Just use an attribute to indicate if the point has a tree.

Bernie.

[JenniferAcunto]

You do not need a Data Expression to do this. Check out Dashboards That Pop:Indicator Hacks and look at the first example.