Welcome to the Forums.
I may not have caught the gist,
but I think you can modify your rule calculation to look like:
IF SUM([Applications]) >= [Apps UB 3SD]
OR SUM([Applications]) <= [Apps LB 3SD]
THEN 1 ELSE 0 END
This will mark if a single point is beyond the 3SD UB/LB.
Then if you wanted to know if any point in the 14 day window
had gotten flagged, you can try, as you suggested, a WINDOW_SUM:
IF WINDOW_SUM([Rule3])>0 THEN 1 ELSE 0 END
Please see workbook v18.1 attached in the Forum Thread:
292740control.twbx 398.0 KB