The UniSearch Tool enables you to run any search on a historical basis. Running a search on a past date, then using QuickTest to reveal the performance, is one way to evaluate the effectiveness of a search. By default, RealTime includes 5 days of Intraday data, and 10+ years of Daily historical data.
Selecting the Run-Date for a Search:

Open UniSearch.
Choose a Search to run from the Search Directory at the left side of the screen.
Click the Date/Time Control on the Local Toolbar.
Use the calendar tool to select a date and/or time.
Click Run Search to run your search on the selected date.