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Tuesday, June 30, 2009

Moving Average Convergence Divergence (MACD) Explained

By Ahmad Hassam

Moving Average Convergence Divergence, acronym MACD and pronounced Mac Dee is one of the simple and most reliable technical tools in your trading arsenal as a currency trader. MACD is a trend following momentum oscillator or indicator and is used often by most of the traders.

MACD shows the relationship between two moving averages of recent prices. It is a lagging indicator. Most technical indicators are lagging which means they are slow. They just tell you what just happened after the fact.

Technical analysis is based on the belief that past prices can be used to predict the future prices in the currency markets. Learning technical analysis is essential for you as a currency trader.

There are many chart types and technical indicators used in the technical analysis. Technical analysis helps you to read your charts. This is the key to understanding the market behavior.

MACD is calculated by subtracting a slow exponential moving average (EMA) like 55 from a fast exponential moving average like 21. Signal line is calculated by the taking the EMA of MACD for a number of bars like 8. The Histogram is the difference between the MACD and its signal line. 55 and 21 are the number of periods that you use.

MACD is one of the most popular indicators used by forex traders. However, beware that MACD is often misused. Like any other technical indicator you should use it in combination with other technical indicators.

Crossovers: A crossover happens when MACD falls below or rises above the signal line. When MACD rises above the signal line from below, it is a bullish signal. It indicates that you should buy. Conversely, when MACD falls from above, it is a bearish signal. It indicates the time to sell.

Divergence: When the price diverges from MACD, it indicates the end of the current trend. Negative Divergence is when the price action is rising and MACD is falling. Both the price action line and the MACD line are diverging. It is an indication of the change in the currency trend. Thats right! The lagging indicator that is supposed to follow the price is predicting future behavior of the prices in the market.

Dramatic Expansion: Dramatic expansion occurs when the shorter moving average pulls away from the longer moving average. When MACD expands dramatically, it is an indication that the currency is overbought/ oversold and may return to normal soon.

One thing should be very clear. All the above three cases are important and should not be overlooked. However, none of them are signals for a trade. For example, MACD Divergence is tradable when confirmed by other indicators. If you simply start trading on MACD Divergence, it may not yield a profitable trade.

However, when confirmed by other technical indicators, success is more likely. This is because of the fact that several things are happening at the same time. Each is attracting the same bulls and bears into the trade that you are planning to make. So you have to confirm your finding with other technical indicators.

When you use MACD, crossovers and dramatic rises are easy to spot. However, spotting MACD divergence comes after a little practice. - 23200

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