Thursday, July 2, 2009

Use Moving Average Crossover

By Ahmad Hassam

A moving average is an average of a predetermined number of prices such as the closing prices calculated over a number of periods like 50 candles. The higher the number of candles in the average, the smoother the line is.

Moving averages are of two types. 1) Simple Moving Averages (SMAs). 2) Exponential Moving Averages (EMAs). SMA is only a simple average. It is obtained by adding all the candles that you would like to measure. EMA is obtained by exponentially smoothing the SMA. The EMA responds more quickly to price changes as compared to SMA. EMA pays more attention to newer candles.

A moving average makes it easier to visualize price action without statistical noise. Instead of watching the up and down behavior of each candle, you are watching the relatively smooth moving average line.

Moving averages are lagging not leading indicators. Its signal occurs after the new price movement not before it. Moving averages do not think ahead. They can tell you what has happened, not what will happen.

Still, moving averages have a critical role to play in planning your trades in advance. Past does not always predict the future but it sure likes to repeat itself. Several different moving averages are used at once. They offer different pieces of the puzzle when planning our trades.

MAs keep us in our trades when the market is steadily rolling forward. Suppose something changes like the moving average crossover. Its time to get out or trade the new direction. MAs are frequently used as price filters.

To filter choppier price action into a reliable indication for true price action, a short term moving average has to cross a long term moving average. The most obvious use of moving averages is to watch for crossovers to confirm new trends.

Short term MAs are more sensitive to price action as they are measuring fewer candles. Longer term MAs are less sensitive to price action. Longer term MAs tend to be more flat and are less likely to whipsaw up and down.

When MAs do crossover, you should take notice at once and if the fast EMA crosses below the slow EMA, it is predicting new downward price action. However, if the fast EMA crosses above the slow EMA, it is predicting a new upward price action.

However, such crossovers should not prompt you to jump into a trade at once. MA crossovers often occur too late and will put you in the market with an unfavorable risk to reward ratio.

Not every crossover is the same. A crossover should be part of the trade plan that you have developed in advance. Moving average crossovers are great as they are easy to see and will immediately attract your attention but they simply do not replace the work of planning your trades.

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