Swings widen into chaos, then contract back down into a single point — a genuine broadening-then-narrowing shape that only reveals itself once it's nearly finished.
Chartists noticed a rare combination: a broadening formation (widening swings) that flips into a symmetrical triangle (narrowing swings) — together outlining a diamond.
The landmark text treats this as one of the genuinely less common patterns — real, but far less frequent than a head and shoulders or a double top.
Because it requires real volatility and real indecision, it tends to show up near significant, often climactic market tops rather than in quiet, orderly markets.
Traders today treat it with real caution — it's often far easier to spot after the fact than while the narrowing phase is still forming.
The first half shows swings getting wider and wider, then a pivot where swings begin contracting symmetrically back toward a point.
This pattern needs real volatility expansion followed by real volatility contraction — the two halves are a signature of indecision peaking, then finally resolving.
Confirmation, as a top, is a real close below the narrowing triangle's lower trendline. Measure the diamond's widest vertical point and project it downward from the break for a rough target.
Around the cycle high, price showed genuinely widening swings that then tightened into a narrowing squeeze, before breaking down into the 2022 decline.
Technicians have retrospectively pointed to a widen-then-narrow structure around the dot-com peak — a reminder that this pattern is usually clearer looking backward than forward.
After a strong uptrend, swings widen dramatically for weeks, then begin visibly contracting back toward a point. What might be forming?
Swings widen for a few weeks but never contract again — price just keeps swinging wildly with no narrowing phase. Is this a diamond top?
A trader spots the narrowing half only (no clear widening beforehand) and calls it a diamond top. Is that a fair label?
A widen, a narrow, and a break — watched tick by tick on the left, and the mark it leaves in the ledger on the right. A confirmed diamond top — and a half-formed shape that never earned the name.
Widening swings appear. Judge whether the narrowing half genuinely completes the shape — then call it: a real diamond, or just a half-formed broadening pattern.
The classic error is forcing this rare label onto ordinary volatility. The discipline is mechanical: require both halves to genuinely complete, then wait for a confirmed close beyond the relevant trendline before trading it.
A rare shape, born from real volatility widening, then genuinely contracting back into a point — easier to see in hindsight than while it's still forming, so trade it with the caution its rarity deserves.
The calm is never as calm as it looks, and the storm is never as chaotic as it feels.