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Shared Scans
GAP Percent Change
Name
GAP Percent Change
Submitted
by
Chad Payne
Periodicity
Daily
V#1: Instrument Value #1
OP: Open
PREV: Previous Close
Explanation
This scan is used to set the V#1 Data Column to the percent change between the session opening
price and the previous session closing price. In essence it measures
the opening gap as a percent change. This scan should be run only
once a day to set this column shortly after the open of session (maybe 15
minutes after). The ROU operation is used to round the value to two
decimal places. The column V#1 should then be added to the target
quotepage so the values can be viewed. The quotepage can then be
sorted on this value by either CNTL-clicking or SHIFT-clicking on the
column header. The reason for the '!' in front of the scan is to
cause the scan to result in a FALSE value for each instrument, and
therefore not bother us with a resulting quotepage. The SET function
always returns TRUE, so by putting a '!' in front, we are forcing it to
always be false. The V#1 value still gets set regardless of whether
the resulting scan value is TRUE or FALSE. The purpose of this scan is
simply to set the value of that data column. There are 20 different
custom columns, V#1 throught V#20, that can be set to different values and
displayed in a quotepage.
For more on V# Data Columns, click here.
Signal
!SET(V#1, ROU(100*(OP - PREV)/PREV, .01))
NA