Market Breadth — Cantillon Research

A/D Net

+842

Today

A/D Ratio

1.74

Adv / Dec

A/D Line

41,220

Cumulative

McClellan Osc

+38.4

19 / 39 EMA

Summation Idx

+1,840

Cumulative

% > 50 MA

62.4%

S&P 500

% > 200 MA

55.1%

S&P 500

📊

Market Breadth — Members Only

Cumulative A/D line, McClellan Oscillator, Summation Index, % above key MAs, and breadth divergence signals. Available to all monthly and yearly subscribers.

Not a member? View plans →

Advance / Decline Analysis

Cumulative A/D Line — NYSE

Running sum of (Advancers − Decliners). Divergence from S&P 500 signals structural weakness or recovery.

—

Daily Net A/D

Advancers minus Decliners each session.

—

A/D Ratio

Advancers ÷ Decliners. Above 1.0 = broad participation.

—

McClellan Indicators

McClellan Oscillator

19-day EMA minus 39-day EMA of ratio-adjusted A/D. Overbought >100, oversold <−100.

—

McClellan Summation Index

Cumulative oscillator. Above +1000 = strong bull phase, below −1000 = bear phase.

—

Participation & Volume

% S&P 500 Above 50-Day MA

Below 40% = weak. Above 70% = healthy breadth. Extremes signal turning points.

—

% S&P 500 Above 200-Day MA

Structural health. Below 50% = bear market internals regardless of index level.

—

NYSE Up/Down Volume Ratio

Up volume ÷ Down volume. Above 2.0 = strong buying. Below 0.5 = heavy distribution. 9:1 days mark climactic moves.

—

Member Access

Market Breadth Dashboard

Market Breadth — Members Only