McClellan Oscillator Intro
The Oscillator was developed by Sherman and Marian McClellan for use with the New York Stock Exchange (NYSE) and is currently carried on by their son Tom.
It is essentially a look at the momentum of the underlying breadth of the market.
When it is above zero, momentum is positive; below zero, it is negative.
It also works as an overbought/oversold indicator when it pushes above +100 or below -100, respectively.
During times of major trend change, the indicator will often hit an extreme, then the market will fail to react, suggesting a change in the market’s tone and a higher probability that the overall trend is changing.
How does it work?
The McClellan Oscillator is taken by first subtracting the advancing assets from the declining assets for the entire market to determine the net advances and declines for the market.
Two moving averages are taken of this net market behavior, one for a 39 day period and one for a 19-day period.
- When the McClellan Oscillator is positive, advances are dominant in the market.
- When the Oscillator is negative, declines are dominant.
Traders take this as a signal of the overall momentum for a market.
Overbought / Oversold
Signals in excess of 100 or -100 are signs that a market is either overbought or oversold, respectively.
- If the Oscillator moves from -100 or below into positive numbers, a buy signal is generated.
- If the Oscillator moves from 100 or above into negative numbers, a sell signal is generated.
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