Zweig Breadth Thrust
There has been a lot of chatter regarding the Zweig Breadth Thrust over the last few days and it is very easy to plot at StockCharts. First and foremost, I used to watch Marty Zweig on Wall Street Week, I subscribed to The Zweig Forecast for a while and I have read his book, Winning on Wall Street. Zweig was a big influence on me as a technical analyst and I learned a lot from him. Liz Ann Sonders of Charles Schwab wrote a great piece after he passed away and shared what she learned from Marty. Her thoughts echo mine and I highly recommend reading it (here).
So what is the Zweig Breadth Thrust anyway? Our very own Greg Morris wrote a blog post on this very indicator in January 2015. This post comes from Chapter 5 of his book, Market Breadth Indicators, and includes details on several other breadth indicators. According to Morris, the indicator is based on the 10-day EMA of NYSE Advances divided by the sum of NYSE Advances plus NYSE Declines (A/(A+D). A breadth thrust occurs when the indicators moves from below .40 to above .615 within ten trading days. A similar move outside the ten trading day requirement does not count as a breadth thrust.
