Hi Giorgio ,
What we are telling Excel is that if the cell to the left of the current cell in column C is having the maximum value within column B , then color the current cell in column C.
Since we have used B1 , and not B$1 , as we go down , Excel internally changes the CF formula to :
=B2 = MAX( $B$1:$B$2 )
even though the CF formula will not change , since it has been applied to the range C1:C2 ; only if you copy the format from one cell to the other does the CF formula change.
Thus , if you had initially applied the rule to only cell C1 , and then copied the formatting rule to C2 , you would see the CF formula for C2 as :
=B2 = MAX( $B$1:$B$2 )
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As far as your second question is concerned , CF rules do not work with other sheet references , but the way around this is to use defined names or named ranges ; these can then be applied to CF rules.
See your file now.
Narayan