In Unisearch, under Date/Time, I can only select a certain single day/date. I would like to be able to be given the option of selecting "within", say, the last 30 days or whatever period I choose. As an example, I want to write Run Search that will give me ALL the days the trading volume was say, 5 times greater than the average daily trading volume WITHIN the last 30 days and not just on the thirtieth day.