Deep Crab

The Pattern

The Deep Crab is a Crab variant with one change: the B point retraces a deep 0.886 of XA instead of the Crab’s shallower 0.382 to 0.618. The completion is the same, a 1.618 extension of XA reached through a long C-to-D projection.

The deeper B gives the structure a different internal shape while keeping the Crab’s dramatic final overshoot.

The Idea Behind It

The deep B point means the pullback inside the structure runs almost the full length of the first leg before the extension begins. The read is the same as the Crab, a fade of a far overshoot, but the deeper retracement is sometimes taken as a sign of a more decisive structure.

When It Tends To Work

Like the Crab, it works on an exhausted spike into the 1.618 extension. The deep B can make the completion level easier to project early, since the structure is well-formed by the time C develops.

When It Tends To Fail

It carries the same risk as the Crab: fading a violent move that does not stop. The deep B also sits close to the origin, so a structure that looked like a Deep Crab can resolve as a simple trend continuation instead.

How This Strategy Trades It

On a completed Deep Crab, the strategy enters at the close of the confirming bar against the overshoot, targets a 0.618 retracement of the structure, and stops just beyond D. See the Harmonic Patterns family page for shared mechanics.

What The Backtest Says

The Deep Crab is uncommon, and its results are split across the samples below: some cells turn a clear profit, others lose. With modest occurrence counts, the spread is wide. The 15-minute equity-index readings are the more encouraging end.