Tuesday, March 31, 2009

Know the Warning Signs


he Moving Average Convergence Divergence (MACD) indicator combines a moving average crossover system with the overbought/oversold elements of an oscillator. A buy signal occurs when the faster line crosses above the slower and both lines are below zero. A sell signal takes place when the faster line crosses below the slower from above the zero line. Longer-period signals take precedence over shorter-period signals. The MACD histogram plots the difference between the two lines and gives even earlier warnings of trend changes. It's called a histogram because vertical bars are used to show the difference between the two lines on the chart.

As can be seen in the EUR/USD 1-hour chart below, the MACD indicators cross over one another beneath the zero line to show a buy signal and vice versa for the sell signal. This occurs most prominently at 1.2760 to buy, 1.2870 to sell.

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