Hi
Do you need to refresh??
remember also the drop down box you select data it returns address box to number to selected range?? yes..
so the box means nothing to target as macro, unless the macro works on number that changes in that changed cell on change in drop down box.
If your sill with me, you need to set the target away to col Z or what evere and dropdown to the Y col and in Z have vlookup tio refer back to the data source the dropdown gets ints referencing from.
then the drop down change is reflected in three places and will target as macro trip and colour you line, no real VBA adjustmenty bar taret column = X not A and set the sheet to allow changes.
I really do hope you can follow that, and it will work as this i have just done today and sucess....
BTW i hide the data reference cells.. tidy that way.