A secondary cross-sectional function, which requests that the primary function be calculated separately for each group of stocks that share the same business sector name
Example
Calculates the average 100-bar ROC of all stocks in this sector and stores it as "SectROC" for each stock.
Notes
Requires data with ?Sector names in each stock record.
Norgate provides these automatically -- use Classification to specify which scheme to request at Import time.
For other data sources you would need to provide them via a SymInfofile.
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