NYSE McClellan Oscillator: updated 03/13/15

Created 1969, the McClellan Oscillator is recognized by technical analysts as the essential tool for measuring acceleration in the stock market. Using advance-decline statistics, it gives overbought and oversold indications, divergences, and measurements of the power of a move.

NYSE McClellan Oscillator

Chart Interpretation
First, taking the Oscillator down to zero is not that hard to do under the current conditions (high Summation Index).  For those unfamiliar with this indicator that my parents developed in 1969, the McClellan Oscillator is the numerical difference between two exponential moving averages (EMAs) of Daily Breadth.  These are known as the 10% Trend and the 5% Trend, the terminology owing to the original references to EMAs made by P.N. Haurlan.  He was a JPL rocket scientist who used EMA math for tracking satellites in orbit, and who was the first to use EMAs to track stock prices.

More at
http://www.mcoscillator.com/learning_center/kb/mcclellan_oscillator/more_on_how_not_to_use_indicators/