EXCEL 2010 Display of KPI data in a Matrix

I am trying to produce a reusable  report that includes an indicator in a particular cell based on two numbers.

I have a block of cells in a, say, 6x6 matrix and would like to show specific character (x or dingbat) in the matrix; the position in the matrix based on two values in another part of the spreadsheet.

The logic would be along the lines of "Display ? in cell( a25, offset up(value in cell f23), offset across( value in cell l19))"

I can do this by placing an if  statement in every cell in the matrix but wondered if there is an easier way to do this with a single function. The matrix would be replicated in various sections of the report and the 'if' approach would require an edit of every cell in the matrix

Many Thanks

Bob