When momentum structure and breadth break together

Momentum as an internal map

Relative change in price over a chosen lookback can be read as an internal map of market action rather than only as a check on moving averages. In this workflow that reading is called momentum.

The comparison baseline is a moving-standard: a short average of two to six bars, rebuilt each day on a daily oscillator and each week on a weekly oscillator. The same baseline can be built from highs, lows, and closes, or from an advance-decline series.

The method then distinguishes three things. It asks whether a new price extreme is matched on the oscillator. It asks which way successive oscillator readings are pointing. It asks what support, resistance, or trendlines those readings have formed.

Confirmation and caution

Confirmation is a new price extreme that is matched by a new extreme on the momentum oscillator. Nonconfirmation is a new price extreme that the oscillator does not match. When price exceeds a prior high or low and the oscillator does not, the mismatch is treated as a reason for caution, not as a standalone action rule.

A micro-nonconfirmation is a mismatch between adjacent or closely spaced periods on the same oscillator. A macro-nonconfirmation is a mismatch between two unconnected time units on the same oscillator. Both stay inside that caution reading. They do not, by themselves, replace the later check of structure and of other horizons.

Structure before a break

One oscillator print above the prior print is a minor uptrend and one below is a minor downtrend. A sequence of those minor swings over roughly 10 to 15 plotted days can define a larger momentum-trend.

Oscillator trendlines and tested momentum levels are momentum-structure. That structure must exist before a structural break can occur. Without that structure a large price drop is treated as unlikely. A line break is given more weight when price and momentum already disagree.

Agreement across horizons

A daily oscillator that looks vulnerable is discounted if weekly or monthly oscillators do not agree. Shared deterioration on daily and weekly horizons is presented as a stronger reversal condition than a daily reading alone.

When breadth is read the same way

Advance-decline-momentum is the difference between the latest closing advance-decline line and a recent average of that line, used as a breadth oscillator. The same moving-standard idea that is applied to highs, lows, and closes can be applied to an advance-decline series.

One completed sequence

In the 1989 S&P 500 case, monthly momentum had advanced for 15 months by July. August price highs failed to confirm versus July. A 17-month oscillator uptrend held at the September low and was then broken in October after a final unconfirmed price high.

Weekly price still showed higher highs and higher lows while weekly momentum had already been declining for two months. That weekly momentum later lost a month-long uptrend after the early-October bounce.

After 10 consecutive higher daily closes into 9 October, daily momentum topped on 3 and 4 October below its late-August peak. An advance-decline oscillator of the close versus the prior three-day average broke its uptrend on 10 October, one session before the daily price oscillator.