Starting with the release of Strategy ONE (March 2024), dossiers are also known as dashboards.
Credit to Remco Leguijt for initially sharing this solution.

This is a method to get horizontal bar charts and % change arrows within a grid. It is based on Strategy Tutorial.
To start, build a report with the attributes Region and Year and the Units Sold metric. Run the report.
Use the formula:
Trunc(((100*[Units Sold])/Sum<UseLookupForAttributes=True>([Units Sold]){@cols}))
The Repeat String (
RepeatStr(
String,Times
)function will repeat the full block character according to the value of value in the second part of the formula. The full block character can be created in a Word document by using the shortcut key 2588, Alt+X or by inserting a symbol and searching for the Full Block character.
RepeatStr("█", [Percent to Total By Columns (Units Sold)])
This is an example expression and not a real Pct Change formula. The expression generates some small numbers which are partly negative in this specific demo scenario. A real example would be something like change vs LY.
Use the formula:
0.01*([Percent to Total By Columns (Units Sold)]-15)
[<-0.01]- #,##0%" ▼";[<=0]-#,##0%" ►";[>0]+#,##0%" ▲"

Create a derived metric and use the formula:
Concat(IF(([Percentage Change]>0),
Concat(RepeatStr(" ", Abs(Floor((100*[Percentage Change])))), " "), ""),
RepeatStr("█", Abs(Floor((100*[Percentage Change])))), IF(([Percentage Change]<0),
Concat(" ", RepeatStr(" ", Abs(Floor((100*[Percentage Change]))))), ""))
The Negative Bar doesn’t work in dossier using this formula, but the other examples work fine as below.
