Hi Matthew. I think that I have had this same issue for a while now and have not had any luck. With these running sum (hockey stick) sales charts you can do Days since onsale (onsale being first MOS startdate which you have) or days before performance, the latter also not being helpful as it skews the result based on a relative date the orders performance. What I'd love is Final Performance Date - Order Date (ie: days prior to closing). For that I'd need a new column in BI.VT_Order_Details on the Sub Line Item. I managed to make a basic version of this in SSRS but not in Analytics. If I manage to work it out I'll let you know but I've received head scratches all around.