Dollar signs in excel "fix" element on the right.
$ C18
means that C will always be fixed, and 18 can change
C $ 18 means that C may change, but 18 is always fixed.
$ C $ 18 means that C is fixed and 18 is fixed (i.e. always use C18 no matter which direction you drag the cell)
I donβt fully understand what you want to do, but hopefully the above will help
based on the comments below i think i understand what you mean
try this formula
=INDIRECT(ADDRESS(1,ROW()))/$C$18
here address takes a row and column, so row = 1 and column =, of which you are always (so row1 = A, row2 = B, etc.)
then indirect allows you to use this as a control point
Hope that works
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