Letters To S&C by Technical Analysis, Inc.
ARTICLE SYNOPSIS ...LETTERS by Technical Analysis, Inc.
COPPOCK'S ORIGINAL FORMULA
Regarding my article ""The Coppock guide"" in the March 1993 issue, astute technicians may have noticed
that the described formula varied somewhat from Coppock's original formula, which he explained in a
Barron's article published in October 1962.
Using Coppock's original rules, the DJIA's 14-month rate of price change is added to the DJIA's 11-month
rate of price change, and that total is then used to determine a 10-month weighted moving total. The
moving total is calculated by multiplying the sum for the most recent mo...