Wish I could but the document is too big.
Both graphs show an accumulation of two expressions with a dates dimension. The bottom graph shows the data graphs with no selections. The top one with a few selections.
I created the line on top of the graphs as a target that is twice the bottom line's value at the end of the period accumulated evenly over the period of dates so that it ends at twice the bottom one on the last day.
When I do a few selections like in the top graph it doesn't work because then the number of days drops and the top line or target only accumulates for the number of dates allowed for the selection.