TPO Letters/Blocks For Certain Time Periods Are Missing

If TPO letters or blocks in a TPO Profile Chart, do not display for certain time periods, then do the following:

• Go to Chart >> Chart Settings and make sure the Start Time and End Time cover the time period you want to view.
• If you still have a problem, remove the TPO Profile Chart study from the chart and ensure that there is data in the chart for the missing time periods.