I just reached my target on an odometer-style goal, 9 days ahead of schedule. But the status bar still says "9 days, etc, until Goal Date' and there is a 9 watermark on the graph still. The only thing that looks completed is the yellow status bar on the right hand column.

Something else is in order: an arrow from the last data point that I entered, at the goal value, to the bulls-eye of the target. Simple and on theme!