GROUP ACTIVITY REPORT (Modified 03/23/05, add 90-day H/L marks)
This page contains explanations and descriptions for "GROUP
ACTIVITY" reports. Each report will carry a link to this page
so those interested can gain a clearer understanding of the data
reported. The report lists data for 209 Medial General Groups.
The data is developed from Worden Brothers software. Here is
how the data is processed:
1) All groups are processed daily.
2) Each group has an accumulator to which values can be assigned.
3) If a group's volume is greater than it's 90-day average volume
if the group went "up" today
3 is added to the group's accumulator
if the group went "down" today
3 is subtracted from the group's accumulator
if the group was unchanged today
if the accumulator is positive, it is decremented (by 1)
if the accumulator is negative, it is incremented (by 1)
4) If a group did not have a volume greater than it's 90-day
average volume
if the accumulator is positive, it is decremented (by 1)
if the accumulator is negative, it is incremented (by 1)
5) special logic handles cases where the foregoing operations
require a transition between positive and negative values in
the group accumulator.
The information is recorded and reported in 6 columns:
GROUP - is the Media General Group Number
* - is the 90-day high or low indicator
NAME - is the group name
NOW - is the current value of the accumulator
MAX - is the greatest value the accumulator has attained on
its present run
DAYS - is a visual indication of group activity over the last
35 trading days
Each day of the week is assigned a numeric and alphabetic value:
Monday 2 B b
Tuesday 3 C c
Wednesday 4 D d
Thursday 5 E e
Friday 6 F f
The day of the week values for the current day are at the top
of each report, as a guide.
DAYS is a rolling record of the most recent 35 days trading
activity. After the full length of 35 days is reached, the
leftmost character is dropped each day and the new character
is added on the right, as follows:
If 3 was added to the accumulator today, the capital of
today's letter is added to DAYS
If 3 was subtracted from the accumulator today, the lower
case value of today's letter is added to DAYS
If today's volume was less than the 90-day average volume,
an underscore is added to DAYS
The bottom of the report has two information blocks:
The first shows the number of groups that exceeded their 90-day
average volume today, how many of those were up and how many
down.
The second gives a count of the groups which have a bullish
accumulator (NOW values greater than zero), those which have a
bearish accumulator (NOW values less than zero), and the sum of
the accumulator (NOW) values. This last has proven to be an
excellent indicator of the health of the market.
Fred
Modifications:
03/28/04: stop discarding the content of DAYS under certain
conditions. This change will leave about 30 days activity
for each group. Marks indicate a group with volume above
the 90-day average and the mark's case shows whether the
group was up or down on the high-volume day.
05/06/04: (superseded by the 05/12/04 modification)
05/12/04: removed the (<) symbol, which indicated that characters
had been dropped from the DAYS list. The DAYS list will now be
a rolling record of the group activity for the most recent 35
trading days. When the list is flush right (after about May
19th), upper case, lower case, and underscore characters for
the current day will be easier to see than in the current
ragged-right format.
03/07/05: removed underscore characters indicating low-volume
days to reduce the clutter in the display.
03/23/05: added a column to mark groups which hit 90-day highs
or lows. The column is headed with an asterisk (*). An "H"
in the column shows a group which hit a 90-day high, an "L"
shows a group which hit a 90-day low.
AI
Market Data 
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