The RTL DV token allows you to refer to a price point at some time in the past using a specific date/time. For example, suppose you are running a scan and wish to compare the current closing price with the price of the issue at the close of last year. Simply add the token DV to your scan token list. A dialog box will appear in which you specify the date as 12/31/99 and the price point as "Close". Then use DV in your scan formula to refer to the 12/31/99 closing price. For example, try this scan:
CL/DV > 1.2; scan for issues up 20% of more this year
The DV token can be added multiple times to the token list to reference variable date/time specific prices in the past. The DV token name must be changed to some other name to distinguish different DV price points. For example, you could set up DV_YEAR_END as the "close" on 12/31/99 and DV_QTR_END as the close March 31, 2000. Then use this follow scan to find issues up more than 30% year to date that were up less than 10% at the end of the last quarter.
CL/DV_YEAR_END > 1.3 AND DV_QTR_END/DV_YEAR_END
The DV indicate can also be used in intra-day scans to test a time specific value. For example, you could setup DV to mean the "(Hi + Lo)/2" of the current days bar at 9:35, and use DV in an auto-scan running on five-minute bars throughout out the trading day. The DV value in this case refers to the high/low average for the first bar of the trading day. The DV can be used to refer to the open, high, low, close, volume, and various other calculated price points at any specific point in time.