Market internals confirm or diverge from the index

Start with the broader market

Most individual stocks tend to move with the broader market. That is why averages and indexes exist, and why a top-down check of market condition is presented as a first analytical step.

A compact market-health review can start with daily or weekly trend questions: whether price is trending or consolidating, and which support or resistance levels would change the view.

Treat internals as vital signs

Breadth and leadership trends are framed as a direct readout of market health. The historical workflow treats them like vital signs rather than relying only on the average itself.

An unconfirmed high in 1998

In the 1998 S&P 500 example, new all-time highs arrived while net new 52-week highs lagged the February-March peak. That formed a major price-indicator divergence and warned that the rally was not internally confirmed.

Panic markers are not standalone triggers

A 40-to-1 excess of new lows over new highs appeared several times in the 1998 decline and is described as a panic-selling marker. Using it as a standalone mechanical buy produced an S&P signal at 1,081 before another down leg.

Sessions where down volume is at least 90 percent of combined up and down volume occurred three times in August 1998, with a panic-buying counterpart on September 8. The historical workflow prefers waiting for an internal higher low, which appeared in October, before treating the washout as a lower-risk entry.

Confirmation and later failure on the Nasdaq

In the 1999-2000 Nasdaq sequence, breadth and leadership confirmed the move through 3,000 and stayed constructive near a widely discussed double top. They then failed on the second approach to 5,000, when net new highs dropped from nearly 400 to about 50 and up volume weakened.

Moving averages as confirmation tools

A 13-day exponential moving average of up and down volume and a 10-day simple moving average of new highs over new highs plus new lows are specified as confirmation tools. The latter is highlighted when it crosses from above 70 to below 70, or from below 30 to above 30.

Inspect the raw series

Growth in nonoperating listings such as bond and closed-end funds is raised as a possible distortion of both averages and internals. The 1998 new-high divergence is judged unlikely to have been created by that influx alone. The historical workflow uses that point to argue for inspecting the raw series rather than trusting a single constructed line.