MACD
MACD indicators
are yet a further extension of the moving
average theory. They are part of the Momentum
indicator family.
MACD simply
stands for Moving Average Convergence
Divergence.
The most common
form used by traders is the MACD Histogram. It
is constructed by measuring the convergence
and the divergence of two moving averages.
The most widely
used time frame is a 12,26,9 macd.
The 12
and 26 ma's are divided and plotted as the
Blue line, the 9 ma is plotted as the Red
line.
A horizontal
line is drawn and is used as the point when
these two moving averages are at the exact
same level. ( The 12,26 macd crosses the 9 ma)
This is called the Equilibrium Line .
A dotted line
is usually added which represents the zero
line.
Bars are used
as a visual aid in determining the position of
the faster moving average in relevance to the
slower moving average.
Bars
pointing above the Equilibrium Line indicate
that the Macd average is above the 9 day
moving average.
Bars
pointing below the Equilibrium Line indicate
that the Macd average is below the 9 day
moving average.
There are 3
mains ways to trade when using Macd's.
The first is
use the crossing of the m/a's as a signal.
A
buy signal is given when the bars first point
above the equilibrium line.
A
sell signal is given when the bars first point
down below the equilibrium line.
The
chart opposite shows two buy and two sell
signals. It is interesting to note where the
signals given correspond to the price action
on the main chart. The first two signals are
pretty much spot on, but after the second sell
signal was given, the price moved higher
before moving down again. On the second buy
signal the price drifted lower before moving
up again. The second sell signal was too low
and the second buy signal was too high. This
is important because traders who set tight
stop losses on their trades run the risk of
getting out of their trade only to watch the
stock rebound.
This
is why it is so important not to rely on only
one technical indicator, it is the culmination
of many indicators that are positive or
negative at the same time.
On this next
chart we have five signals being generated by
the Macd.
The
Red circle indicates 4 sell signals
occurring within 2 weeks of each other. This
is a what I mean by more than one indicator
turning negative at same time, it does not
have to happen on the same day.
The
Pink circle indicates that although the
price did drop on both sell signals, the
support line remained intact. The price only
crossed the 20ma
on the first sell signal but remained above on
the second.
The 20
ma remained above the 50ma
on both sell signals.
The second
method used with Macd's is the Convergence /
Divergence method.
Convergence
means two separate objects heading towards the
same meeting point.
Divergence
means two separate objects moving away from a
meeting point.
For the use in
trading we are interested in the convergence
or divergence of the price chart and the
indicator that we have selected, in this case
Macd.
What we are
looking for is lower lows on the price chart
and higher lows on the Macd. This creates a
buy signal or at least should alert the trader
to a possible trend reversal.
Using this
method is a good visual aid for seeing that a
trend is slowly running out of steam. Nearly
all momentum indicators exhibit these converge
/ diverge properties. Most technical traders
use what is called a lead indicator. This is
the indicator that is the first to show signs
of an impending trend change. Momentum
indicators are usually high on this list.
The same
applies when we are searching for sell
signals. Instead of the lines converging, this
time we are looking for divergence of the
price and the Macd.
We are looking
for the price to be making higher highs but
the Macd to be setting lower highs.
We
are looking for the price to be making higher
highs but the Macd to be setting lower highs.
Again these
signals are only part of the equation when
look to buy and sell. If a trader only looks
to use one indicator he will get caught out
more times than not, but on the other hand, I
believe the use of too many indicators is just
as a fatal mistake as using only one. It is a
fine balance of the indicators that you feel
most comfortable with.
The third
method used is to use the macd line crossing
the zero line as a buy signal and the macd
line making a clear break of the histogram
bars as a sell signal.
This method
creates the least amount of buy and sell
signals but also the least amount of false
signals.
This method is
also the slowest to generate a signal and is
good for the longer term trend changes.
Of course it
still generates false signals like ALL
indicators so advice mentioned already above
about multiply signals should be heeded.
Time Fames.
Choosing which
time frames to use varies greatly and
experimentation is by far the best way to
educate yourself. Again use the same stock and
adjust the settings of the macd to see the
difference in where buy and sell signals are
being generated.
Some standard
time frames are :
12, 26, 9
8, 17, 9
12 ,25, 9
Please
take the time to do your OWN experimentation.
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