Update

New-ConditionalFormattingIconSet.ps1

@@ -4,7 +4,7 @@ function New-ConditionalFormattingIconSet {
         $Address,
         [ValidateSet("ThreeIconSet","FourIconSet","FiveIconSet")]
         $ConditionalFormat,
-        [bool]$Reverse
+        [Switch]$Reverse
     )
 
     DynamicParam {

testCCFMTMultiple.ps1

@@ -0,0 +1,19 @@
+ipmo importexcel -Force
+
+$f = "$pwd\test.xlsx"
+rm $f -ErrorAction Ignore
+
+$p=@{
+    ConditionalFormat = "ThreeIconSet"
+    IconType = "Signs"
+    Reverse = $true
+}
+
+$RuleHandles = New-ConditionalFormattingIconSet -Address "C:C" @p
+$RulePM      = New-ConditionalFormattingIconSet -Address "D:D" @p
+
+ps | 
+    Where company | 
+    Select Company, Name, Handles, PM | 
+    Sort Handles -Descending | 
+    Export-Excel $f -Show -AutoSize -ConditionalFormat $RuleHandles,$RulePM