The full formula is
IF(A5="","",IF(AND(F5<=1.5,VLOOKUP(A5,MyBets!$B$2:$F$500,4,0)="U",$L$2<0,$S$1<0),Controls!$B$6,""))))
so do i change it to
IF(A5="","",IF(AND(F5<=1.5,ISNA(VLOOKUP(A5,MyBets!$B$2:$F$500,4,0),"","U",$L$2<0,$S$1<0),Controls!$B$6,""))))
thanks