Top 10 in a line graph

[alan_grn]

I am trying to draw a line graph for the top x customers.

The code fro the line graph is currently

(

SUM({$<[Business Date]={$(='"<='&DATE(MAX([Business Date]))&'"')}>} [Cr Balance]))

The code for the Top X is

IF

(Aggr ( Rank ( Sum (if([Business Date]=$(vSelectedDate), [Cr Balance] ))) , [Cin Name] ) <= $(vTop) , Sum ( if([Business Date]<=$(vSelectedDate),[Cr Balance] )) )

Both of these work, but how do I put them together?

What I would also like to do is then draw a line for the minimum balance for the sum of the top x customers (i.e. a flat line)