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Shares: Momentum
Buy on the up arrows, sell on the down arrows
Based on the idea that the
trend is your friend, this tool generates Buy & Sell signals using price action alone,
depending only on information available at the time. It relies on analysis of annual rates
of change and moving averages. For comparability, stock market indexes have been rebased
to set year-end 1994 at 100.
In each chart the stock
market index is shown by the
bold white line on the right
hand axis. The moving average is represented by the thin white line alongside on the same axis. The main explanatory
variable, the momentum indicator, is the thin yellow line using the left hand axis. Buy & sell signals are represented by
red arrows embedded in the price index.
This investment tool is
based on the observation that the psychological effect of a shock takes about a year to
wear off. Known as the Coppock Indicator, after the man who successfully applied the
concept for forecasting the US stock market over many decades, this momentum indicator is
designed to generate buy signals. In statistical terms momentum is defined here as a
12-month time-weighted moving average of monthly changes. Buy signals are generated when
the rate of change turns up from a level below the zero line, as shown by up arrows.
However, owing to the
different character of market peaks, the Coppock Indicator has been supplemented by a
Moving Average Indicator for generating sell signals. These arise when the stock market
index falls below its moving average, while above the Zero-line, as shown by down arrows.
Please note that, in order
to provide users with a low-maintenance once-a-month service, signals at times of crisis
may be late. Thus signals will be shown at month-end prices, rather than automatically on
reaching targets during the month.
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