Making excel increment in columns rather than rows

formula:

=IF(colour('Monthly UA Data'!$U$3)=50,1,0)*INDEX('Monthly UA Data'!$U$3:$CN$3,1,C10)


NB 'colour' is a macro that uses the colour index to show the colour of a cell

I want to drag the cell down to fill up the rows below but the trouble is the data im referencing is stacked up horizontally instead. i managed to fix this for the value of a cell using the index function but im wondering how to get the correct cell reference to determine the colour.