T2103 - Zweig Breadth Thrust
Developed by Martin Zweig, this indicator is calculated by taking a 10-day moving average of the number of advancing issues divided by the number of advancing issues plus the number of declining issues. Since it is a percentage indicator, it cannot go below 0 or above 100. However, it is rare that it goes below 40 or above 60. This indicator can be useful as an overbought/oversold indicator.