Saturday, September 18, 2010

New Long-Term Buy Signal

Today another long-term buy signal was generated when the S&P 500 Index 50-EMA crossed up through the 200-EMA. Normally, we have high confidence in these signals, but, unfortunately, the long-term model has generated four, count 'em, four "long-term" signals in less than three months. On the chart below the red arrows mark the sell signals and the green arrows the buy signals. Prices have entered a trading range and, as you can see, they move just far enough in one direction to trigger a signal, then they reverse and go just far enough in the opposite direction to trigger the reverse signal.
This is not typical of how the model usually works, but any mechanical model will eventually run into rough patches where peculiar price movement defeats them. This is one of those times, and as long as the 50-EMA keeps making these shallow cuts back and forth, our confidence in the signals will not be robust. (more)

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