MAX FUNCTION

[AlexEanbu]

=MAX(ADDRESS(ROW(A3),MATCH(A3,A2:I2,FALSE()),4):I3)

[#2]

@AlexEanbu 

Instead of an image, you would be helping us help you if you posted a copy of the actual spreadsheet. Put it on OneDrive or GoogleDrive with a link here that grants access to it.

[#3]

@AlexEanbu 

I guess you mean

=MAX( INDEX(B3:I3, MATCH(A3, $B$2:$I$2, 0) ):I3 )

ADDRESS(...):I3 doesn't work. ADDRESS returns cell address as the text, not reference on that cell.