Highest value out of several fields
Return the highest value from a list of numbers consisting of a combination of numeric field codes.
Configuration
Create a Custom smart number field and use the General parsing mode.
Expression
CODE
%{max([{issue.cfAAAAA}, {issue.cfBBBBB}, {issue.cfCCCCC}, {issue.cfDDDDD},
{issue.cfEEEEE}])} 
Please, replace the field codes with the ones of your choice.
Format
Default
Used parser functions
The links lead to the JWTC documentation because the parser functions are shared functionalities.