Support Board

You can select Edit >> Recalculate All Charts.

But the easiest way to resolve this would be to add the Chart Recalculation - Periodic study to each chart and set the Recalculation Time in Seconds to 86400, which is the number of seconds in 1 day. If you add the study in the morning at one point, then it will force a recalculation at that same time each day, which will remove the extraneous lines.