In this sheet, column H finds the weekly MAX from 01/02/1993 based on the OFFSET values given in columns F and G.
The formula in column H is =MAX(OFFSET($B$3,F2,0,1,1):OFFSET($B$3,G2,0,1,1))
The value in H2 is the MAX from 01/02/1993 to 05/02/1993 (calculated from data not shown below)
The...