microsoft.project.courses - Progress Line

On the Tools menu, point to Tracking, and then click Progress Lines.
Click the Dates and Intervals tab.

To always display the current progress line, select the Always display current progress line check box, and then click At project status date or At current date to indicate where you want the progress line drawn.

then go to
On the Tools menu, point to Options and select the Calculation tab and tick
Edits to total actual cost will be spread to the status date