Chart Indicators Glossary and Calculation Methodologies

This post summarizes major chart indicators calculation methodology and their main usage from the perspective of market timing.

McClellan Oscillator, a short- to intermediate-term momentum breadth indicator, It's calculated each day by taking the difference between the 39-day and 19-day exponential moving averages of the number of net advances on the NYSE/NASDAQ.  This indicator is best used to time bottom of a market when there are positive divergence between the index and oscillator's negative readings, for more details, see here

Over-extended Ratio, this indicator can be used to identify potential market tops

Coppock Guide, this indicator can be best used to identify long-term market bottom