It might help to give the dc(msisdn) value a new fieldname in your search string. Try this:
sourcetype=smart_gtp Completed | stats dc(msisdn) as msisdndc | rangemap field=msisdndc low=0-0 elevated=1-1 default=severe
i already try that but still it shows invalid field
i decided to make it in basic xml
sourcetype=smart_gtp Completed |stats dc(msisdn) as msisdndc|rangemap field=msisdndc low=0-10 elevated=11-1000000000 default=severe
the result in this code is "red word" the color of the singlevalue still not change and the no. number msisdndc does not show
Can you include the exact search string of your saved search totalsubscriberstoday? I think the answer is just that it's output rows either dont have a "dc(msisdn)" or dont have a field called "range", but I'd have to see the search string.