DAX code
KPI Status Icon =
VAR CurrentSales = [Total Sales]
VAR PriorSales = [Previous Year Sales]
VAR PctChange = DIVIDE(CurrentSales - PriorSales, PriorSales)
RETURN
SWITCH(
TRUE(),
PctChange >= 0.05, "▲",
PctChange <= -0.05, "▼",
"▬"
)