FYI: We monitor all sorts of different breadth indicators in order to get a feel for how market internals compare to moves in the major market averages, and one of the most widely followed of these indicators is the S&P 500’s cumulative A/D line. The cumulative A/D line is simply a running total of the daily net number of stocks in the S&P 500 rising or falling.
Regards,
Ted
https://www.bespokepremium.com/think-big-blog/sp-500-cumulative-ad-line-tracking-price/