What is market breadth and why do traders track it?

Market breadth measures how many individual stocks are participating in a market move — not just whether the index is up or down. Index levels are cap-weighted, so a handful of mega-caps can lift the S&P 500 while most stocks are actually declining. Breadth metrics count every stock equally, revealing the true internal health of the market before the index confirms it.

What is the $3 + 100k filter and why does it matter?

Before any stock is counted in a breadth metric, it must have a closing price above $3 and an average daily volume of at least 100,000 shares over the prior ~35 trading days. The price gate applies to the pre-move close — so a stock going from $2 to $3 does not count, but $4 to $6 does. This removes penny-stock noise and ensures only liquid, tradeable stocks influence the breadth readings.

How do I read the breadth heatmap?

The breadth heatmap plots each metric as a colour-coded cell for every trading day — green for strong breadth, amber for mixed, red for distribution. Reading down a column shows how that metric has trended over time; reading across a row shows the overall health on a single day. Key patterns: clusters of green across multiple metrics signal a healthy, high-confidence tape; index up while heatmap shows red is a divergence warning that often precedes a broader correction.

Core method · Product

Market Breadth in WideRadar

Q: What does the 4%+ daily move count tell you?

A 4%+ single-day gain requires real buying conviction — it is not random noise. Counting how many stocks reach this threshold each day gives a mechanical read on whether institutional money is broadly committed or selectively positioned. A count of 150+ stocks moving up 4% signals a strong environment; 150+ moving down 4% signals distribution and risk-off conditions.

By WideRadar · Published June 13, 2026

How we use market breadth inside the product — as a regime filter before you hunt leaders or open a chart. For the indicator encyclopedia, see Market Breadth Indicators Explained.

The core idea

When 200 stocks make a 4%+ move in a single day, the tape is telling you something real. When only 40 do — while the index is up 1% — large-cap weights are doing the heavy lifting and the internal health of the market is weaker than the headline number suggests.

Why active traders watch breadth

Index levels are lagging indicators — by the time the S&P 500 breaks down, most individual stocks are already in trouble. Breadth metrics show divergence earlier, because they count every stock equally regardless of market cap.

Momentum traders pioneered this approach. The StockBee methodology, popularised by Pradeep Bonde and later embraced by Mark Minervini and Kristjan "Qullamaggie" Kullamägi, treats breadth as the primary environment filter: trade aggressively when breadth is expanding, reduce exposure when it contracts.

The 4% signal — the heart of StockBee breadth

A 4%+ single-day gain is not a random fluctuation — it requires real buying conviction. Counting how many stocks achieve this threshold each day gives you a mechanical read on whether institutional money is broadly committed or selectively positioned.

High up-4% count (150+) — Strong environment. Many stocks are being accumulated broadly. Good conditions for swing entries.
Balanced counts — Mixed environment. Be selective; individual stock fundamentals and technicals matter more.
High down-4% count (150+) — Distribution in progress. Risk-off until breadth recovers. Protect capital first.

The $3 + 100k rule — why filters matter

Raw counts include noise. A penny stock going from $0.50 to $0.55 is a 10% move but meaningless to a momentum trader. WideRadar applies a uniform filter before every count:

All breadth metrics tracked by WideRadar

Each metric counts stocks qualifying over a specific lookback window. Together they give a layered picture of market health — from daily momentum to quarterly trend.

Up/Down 4%+

1 day

The core daily breadth signal. Counts how many stocks made a ≥4% price move. High up-day counts signal healthy buying pressure across the tape.

Up/Down 20%

5 trading days

StockBee's signature burst indicator. Expands at the start of every major bull run and collapses before corrections.

Up/Down 25%

1 month (~21 days)

Monthly breadth — the share of the universe in a genuine monthly uptrend vs a sustained downtrend. A top-level environment gauge.

Up/Down 25%

1 quarter (~63 days)

Quarterly breadth. Persistent strength confirms institutional accumulation across the broad market.

Above 50-day MA

% of universe

The share of stocks above their 50-day moving average. Below 40% signals broad correction; above 60% marks new broad opportunity.

13%+ in 34 days

~34 trading days

Intermediate-term extension count — useful for spotting whether momentum is broad or narrowing to a few sectors.

Reading a breadth heatmap

The breadth heatmap plots each metric as a coloured cell for every trading day, coded from green (strong) through amber (mixed) to red (distribution). Patterns to watch for:

Clusters of green — multiple metrics elevated simultaneously signals a broad, healthy tape. High-confidence environment for swing trading.
Index up, heatmap red — divergence. Mega-cap weights carrying the index while the rest of the market weakens. A warning sign.
Transition from red to green — early-cycle recovery. Watch for persistence above key thresholds before committing heavily.

See live breadth data

WideRadar computes all of these metrics nightly across ~12,000 US stocks and stores 20 years of history. Start with a 14-day free trial.

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References & Data Sources