SUM TO ZERO

IDRIS_A  as  mathetes  (and others) have said we need more information to understand exactly what you want/need.  But looking at the number it almost appears that you have a ledger entries and are trying to find values that don't match up and need to be investigated.  So in that case or similar you want to have paired values highlighted (or ignored).  Here is a conditional formatting formula you can use to highlight any value that does not have a corresponding matched but opposite value. Note that it will highlight the FIRST x number of occurrences of that value so if you have 5, 5, -5, 5, 5, -5, -5 it will highlight the FIRST 5 and not the following 5s or -5s because those have 'matches'.  BUT if this is a ledger and you want to know the unmatched line item you may need additional info to distinguish which 5 and -5 actually match up.  AGAIN, we need more info to fully help.  

Here is the Conditional Formatting formula I mentioned and used in the attached sheet to highlight the UNmatched values in RED:

=((COUNTIF(A:A,A1)-COUNTIF(A:A,-A1))>=COUNTIF($A$1:A1,A1))*ISNUMBER(A1)