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 Sun Microsystems (NASDAQ: SUNW)
>From the chart below, you can see how well the MACD indicator has worked
with SUNW.
The most recent Buy signal occurred at noon EST on December 2, 1999 at 134
1/16.
SUNW rose the rest of the day and then gapped up on December 3.
The MACD is has now flashed a Sell signal at 145 7/8 at 2:00 PM EST today,
December 7, 1999.
I would exit longs in SUNW.
An aggressive trader may want to enter a Short here.
I would place my stop at 148 �.
Note: SUNW stock will reflect a 2-1 split tomorrow from these prices.
