Instead of writing the very long:
=OFFSET(INDIRECT(ADDRESS(ROW(), COLUMN())),0,-1)
You can simply write:
=OFFSET(*Name of your Cell*,0,-1)
Thus for example you can write into Cell B2:
=OFFSET(B2,0,-1)
to reference to cell B1
Still thanks Jason Young!! I would have never come up with this solution without your answer!