Four-stage double-bottom construction

Four checkpoints instead of two troughs

This editorial article treats the double bottom as a four-checkpoint construction test. The checkpoints are an exhaustion low, a thin intervening rebound, a quieter retest, and a later clearance of that rebound high on increasing activity.

The aim is to keep the pattern a falsifiable structure. Each checkpoint can fail, so two similar troughs on a chart are not treated as a completed double bottom.

Base-building after a decline

A decline is often described as ending through a time-consuming base-building phase in which mixed information keeps prices sideways before a later uptrend can form.

A double bottom is presented as the chart base that marks this transition: a steep drop with rising activity, weak intervening rallies, a second low, and a later advance.

The exhaustion low

The first extreme low is associated with one-sided selling and a surge in activity after participants abandon the market. That trough is the exhaustion low.

Selling at the first low is described as having been absorbed by longer-horizon participants who treat the episode as the late stage of adverse news rather than a reason to add supply.

The intervening rebound

The rebound from that low is attributed mainly to a shortage of sellers and short covering, and it typically unfolds on light activity with narrow ranges before stalling. That advance is the intervening rebound.

In this editorial reading, the stalling high of the intervening rebound is the resistance the later clearance has to cross.

The quieter retest

The later decline back toward the first low is characterized by noticeably lighter activity, narrower ranges, and comparatively insignificant selling. That decline is the retest.

In this editorial reading, the retest is judged by that quieter character, not by whether the second trough copies the shape of the first.

Clearance of the rebound high

The formation is treated as complete when a subsequent advance, on increasing activity, clears the resistance created by the intervening rebound high and is read as the start of an uptrend. That advance is the clearance.

Until that clearance, the episode remains base-building. In this editorial reading, the double bottom is unfinished if price never clears the intervening rebound high on increasing activity.