Moving Averages.
Forex traders have been using moving averages for decades
now and they are still one of the best ways to identify changes in trends. They
can even be used for reversion strategies, by taking the opposite direction
when a crossover occurs.
However, moving averages have one inherent flaw which is
that they will always be lagging indicators. In other words, by using past data
they will only identify a trend once it has already occurred. The problem is
speeding up a moving average leads to overshooting the market and more
whipsaws. Designing a moving average then, is a trade off between lag and curve
smoothness. And what some traders may not know is that there are several types
of moving averages out there that aim to solve this issue.
Moving averages smooth the price data to form a trend
following indicator. They do not predict price direction, but rather define the
current direction with a lag. Moving averages lag because they are based on
past prices. Despite this lag, moving averages help smooth price action and
filter out the noise. They also form the building blocks for many other
technical indicators and overlays, such as Bollinger Bands, MACD and the
McClellan Oscillator. The two most popular types of moving averages are the Simple
Moving Average (SMA) and the Exponential Moving Average (EMA). These moving
averages can be used to identify the direction of the trend or define potential
support and resistance levels.
The Basics of the Moving Average
At its root, a moving average is simply the last X period’s
price divided by the number of periods. This gives us the ‘average’ price over
the last x periods. And this will be expressed on the chart, much like price
itself.
Looking at price movements expressed as an average can
present quite a few clear benefits; primary of which is that the wide variations
from candlestick to candlestick are modulated by looking at the average price
of the last X periods.
Traders often have the question of whether or not price is
too high, or too low – but by simply looking at the average price for this
candlestick (in consideration of the prices over the last X periods), the
trader gets the benefit of automatically seeing the bigger picture.
Many traders will take the indicator’s usage much further;
hypothesizing that when price intersects with a moving average, some thing or
the other might happen. Or perhaps traders will imagine that if two moving
averages crossover, some special event may take place. We’ll discuss this
below, but for now – just know that the most basic usage of a moving average is
to modulate price; attempting to eradicate questions that may pop up from the
erratic price swings that can take place from candle to candle.
Commonly Used Moving Averages
There are quite a few different flavors and flairs of moving
averages. Some came about out of trader necessity; others came about from
traders simply trying to ‘build a better wheel.’
The most basic moving average is the Simple Moving Average,
which we explained the calculation of above. Traders will use quite a few
different input periods for moving average for a number of different reasons.
The most common moving average is the 200 period MA, and
many traders like to apply this to the daily chart. It is of the belief that
most trading institutions; banks, hedge funds, Forex dealers, etc. watch this
indicator. Whether it is true or not can, unfortunately, not be substantiated
as most of these institutions keep their trading systems and practices
proprietary.
But one look at this indicator on any of the major currency
pairings can seemingly prove its worth. The chart below will highlight some of
the interesting price action that can take place with the 200 period moving
average applied to a daily chart:
Many traders also like to watch the 50 period’s moving
average. This is thought to be a faster moving average since fewer input
periods are used, and the primary effect is that this moving average will be
more responsive to more near term price movements. The picture below will show
how the 50 periods moving average stacks up to the 200:
Other commonly used input periods are 10, 20, and 100
settings.
Exponential Moving Averages
Out of trader necessity to more closely follow near term
price movements, as many traders feel recent price changes to be more relevant
than older price variations, the Exponential Moving Average will place higher
importance on price values registered more recently.
Since more recent prices are weighed more heavily than older
price swings, the indicator becomes more adaptive to the current price
environment. In the picture below, we’ll compare the 200 period moving averages
as Simple and Exponential MA’s.
A comparison of Simple (in red) and Exponential (in green)
200 period moving averages
Identifying Trends with Moving Averages
Since moving averages provide the luxury of showing us price
in consideration of the last X periods, we have the luxury of being able to
observe tendencies which we may be able to take advantage of.
Nowhere is this more prevalent than when using this
indicator to define trends, which is often the most common application of the
moving average.
If price action is consistently residing above its moving
average, with the moving average inevitably pulling higher to reflect these
increasing prices – traders can consider the chart to be showing an uptrend.
And the exact opposite is true for downtrends.
Moving Averages as Support and Resistance
As we were able to see in the above picture of the 200
period moving average, peculiar events can take place when price interacts with
one of these lines. As such, many traders will look to moving average
intersections as opportunities to buy up-trends cheaply, or to sell down-trends
when price is thought to be expensive. The thought being that while an uptrend
takes a break by moving lower, down to its average, traders can jump in while
price is relatively low. The picture below illustrates further:
Moving Average Crossovers
Some traders will take the utility of the moving average a
step further, hypothesizing that when two of these lines cross, something may
happen. The ‘Golden Crossover,’ often referred to in the financial press is simply
the 50 periods moving average crossing the 200 period MA. When this happens,
some believe that price will continue moving in the direction of the crossover.
Some traders feel moving average crossovers can be
ineffective as they can often produce considerable lag to a traders’ analysis,
compelling traders to buy after an uptrend is well entrenched, or to sell when
a downtrend may be nearing its end.













