The purpose of this Market Call section is to
educate readers in technical analysis patterns and indicators. As with all investment
information, you need to research information and consult your financial advisor before
initiating any strategies that are contained in Market Call.
Also, you must realize that as with all trading strategies,
opinions can change quickly depending on market conditions and developments.
This column tries to present historical examples, potential set
ups, and examples of entry and exit strategies.
MACD "Moving Average Convergence/Divergence"
The MACD is a trend following momentum indicator that shows the
relationship between three moving averages of prices.
This method can be used for any time frame. It could be 5 minute bars, 15
minutes bars or daily bars. Many traders will also trade in multiple time
frames using a longer time frame for trend, and the shorter period for
entry and exit.
The MACD is the difference between a 26-period and 12-period exponential
moving average. A 9 period exponential moving average, called the "signal"
(or "trigger") line is plotted on top of the MACD to show buy/sell
opportunities. On the charts below, the MACD line is the green colored
line, and the trailing, slower moving line is the signal line. Some
technical analysis programs will show the MACD as a histogram bar.
There are three popular ways to use the MACD: crossovers,
overbought/oversold conditions, and divergences.
The most common use is as a crossover method. Using this interpretation,
the trading rule is to sell when the MACD falls below its signal line.
Similarly, a buy signal occurs when the MACD rises above its signal line.
It is also popular to buy/sell when the MACD goes above/below zero.
Some traders will use MACD as an overbought and oversold indicator. When
using the indicator in this manner, when the shorter moving average pulls
away dramatically from the longer moving average (i.e., the MACD rises), it
is likely that the security price is overextending and will soon return to
more realistic levels. MACD overbought and oversold conditions vary from
security to security.
The other way some traders use MACD is to spot divergences from an
anticipated movement. Since there are no indicators or patterns that work
all the time, reactions against the anticipated move can signal a major
move. A bearish divergence occurs when the MACD is making new lows while
prices fail to reach new lows. A bullish divergence occurs when the MACD is
making new highs while prices fail to reach new highs. Both of these
divergences are most significant when they occur at relatively
overbought/oversold levels.
Let’s look at Yahoo Inc. (NASDAQ: YHOO).
This is an example of MACD working as it should.
Many stocks have patterns similar to YHOO and the following example should
be used to help you focus on the exit.
On January 20, 2000, YHOO had a MACD Sell signal at 350. A trader could
Sell short or exit a trade when at this point.
YHOO then declined hitting a low of 316 today in the morning.
By 3:00 PM today, January 25, 2000, YHOO signaled a MACD Buy signal.
I would Buy on that signal.
A Buy can still be taken now, but the stop has to be larger.
A reasonable stop would have to be 323.
A trader may also look for a partial retracement of the afternoon move and
try a limit Buy at 329, with the stop at 323.
