rev. 01/06/97
The Absolute Breadth Index (ABI) is a market momentum indicator that was developed by Norman G. Fosback.
The ABI shows how much activity, volatility, and change is taking place on the New York Stock Exchange while
ignoring the direction prices are headed. You can think of the ABI as an "activity index". High readings indicate
market activity and change, while low readings indicate lack of change. In Mr. Fosback's book, Stock Market
Logic, he indicates that historically, high values typically lead to higher prices three to twelve months later.
The MetaStock™ formula for the Absolute Breadth Index is:
ABS ( Advancing Issues - Declining Issues )
To plot it:
Create a composite security of the Advancing Issues - Declining Issues. In Windows versions use The
DownLoader™ to create the composite or in the DOS versions use MetaStock's File Maintenance to
create the composite.
In MetaStock open the composite and plot the custom formula ABS( C ) on it.
**For interpretation refer to the book Stock Market Logic by Norman G. Fosback.
Advance / Decline Line with Negative Volume
There is a way to get the negative volume on an advance-decline line chart in MetaStock™ for Windows™.
The requirement is: Each security must have both the number of issues and the volume in the file. Advancing
issues with advancing volume in one security and declining issues with declining volume in one security file.
These files may be obtained from Reuters Trend Data by way of The DownLoader for Windows. You will also
need to create a composite security of the Advance-Decline line, which is the advances - declines.
The following steps will get you an advance-decline line with negative volume where applicable. Follow these
steps once and save as a CHART. When you want to use it simply load the chart and the program will calculate
the new volume plot using the new data.
Create a NEW chart of the advancing issues.
Create a NEW chart of the declining issues.
Create a NEW chart of the advance-decline composite.
Create a NEW INNER WINDOW on the declining issues chart.
Delete the volume plot on the advance-decline composite chart.
Copy the volume from the advancing issues chart and paste it into the new inner window on the declining
issues chart.
Drop the custom formula, P-V on the advancing volume plot in the declining issues chart, creating a new
scale.
Copy that plot to the empty inner window (where the volume was) of the advance-decline composite.
Save that chart as the adv-decl chart (perhaps advdecl.mwc).
This will be the chart you load to do your study of the advance-decline line with negative volume.
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inwestor1