Breadth Thrust indicator for Amibroker (AFL)

The Breadth Thrust indicator is a market momentum indicator developed by Dr. Martin Zweig. The Breadth Thrust is calculated by taking a 10-day exponential moving average of the advancing issues divided by the advancing plus declining issues. According to Dr. Zweig a Breadth Thrust occurs when, during a 10-day period, the Breadth Thrust indicator rises from below 40 percent to above 61.5 percent. A “Thrust” indicates that the stock market has rapidly changed from an oversold condition to one of strength, but has not yet become overbought. Dr. Zweig also points out that there have only been 14 Breadth Thrusts since 1945. The average gain following these 14 Thrusts was 24.6 percent in an average time frame of 11 months. Dr. Zweig also points out that most bull markets begin with a Breadth Thrust.