SWITCH function for changing UNICODE values not working correctly.

This appears to be working now.  I did two things. 

1. I moved it to a measure. 
2. I changed the code, adding the MAX function. 

FCMES = 
VAR WUCL=UNICHAR(128531)
VAR UCL=UNICHAR(128530)
VAR sigma=UNICHAR(128532)
VAR good=UNICHAR(128513)
VAR UCLV=0.875
VAR WUCLV=0.625
VAR sigmaV=0.5
Var goodV=0.3
VAR SWITCHER=
Switch(TRUE(),
Max('Example Data'[Value])>=UCLV,UCL,
MAX('Example Data'[Value])>=WUCLV,WUCL,
Max('Example Data'[Value])>=sigmaV,sigma,good)

Return SWITCHER