A Supplemental Note on MACD

This note is a supplement to the one below it. I felt it may be useful to show how MACD can be an effective tool on more than just a daily chart of a stock. MACD can be used on any time scale chart and works with indexes in addition to individual stocks. Below is a monthly chart of the S&P 500. The chart covers the period from late 1996 until the present. During that period, the S&P has crashed twice. One was the .com bubble burst that lasted from 2000 until 2003 and the other was the mortgage crisis crash that took place mostly during 2008.

Remember, usually the MACD histogram bar chart and the stock price chart move in the same direction. That is, if the stock price is going up the MACD histogram is going up and vice-versa. If they are moving in opposite directions, this is a signal that the a directional change may occur in the stock so that it will again be moving in the same direction as the MACD histogram. In those situations, the MACD histogram is a leading indicator. It gives you an idea of what the price of the stock or the index may do in the future.

Sadly, the MACD histogram did not call the bottom of the 2008 market crash. There was no divergence in the MACD histogram and the S&P price to give a signal. The MACD line crossing the signal line did serve as a useful indicator, but it was a lagging indicator. There was already a substantial recovery occurring in the S&P before MACD gave any signal of it. However, MACD divergence did make an accurate and timely prediction of the market top in 2000, the turnaround in 2003, and the market top in 2007. I'm going to discuss the 2003 turnaround and the market top in 2007 because they are the easiest to see.

The first market top occurred in 2000. From that point you can see that the S&P fell from about 1550 to roughly 765 (a downtrend) between the years 2000 and 2003. During that period, the MACD histogram had a pretty deliberate trend moving from the negative to the positive (an uptrend). In early 2003, the MACD line crossed over the gray signal line and the histogram turned positive. From that point, the market continued its trend upward until late 2007. However, the MACD histogram had been trending down towards the negative and finally went negative with the MACD line crossing below the gray signal line in late 2007.

In both situations, people paying close attention to the MACD on the monthly S&P 500 chart would have had a pretty good chance of catching both the bottoms and the tops of the market. Technical investors like to see confirmation of a signal. In the case of the 2007 market top, not only was the MACD signaling that things were going to make a turn for the worse, there was also a "double top". Do you see how the market basically topped out in 2007 at the same point it did in 2000? This is a very common chart pattern that technicians look for, but I'll save further discussion on that topic for another time.