PRZ Stop Placement and Scaled Entry: Risk Management Inside the Reversal Zone

The PRZ is not a level — it is a band where the pattern may complete. Treating it as a single price forces you to enter too early or too late. The fix is to scale in across the zone and let the stop move with the fill.

Every harmonic completes inside a Potential Reversal Zone (PRZ) bounded by the cluster of defining ratios. Entering at a single price inside that band guarantees you are wrong about the exact completion on a meaningful fraction of trades. The method below trades the band, not the point.

Defining the PRZ boundaries

• Near edge: the primary completion ratio (0.786 for Gartley, 0.886 for Bat, 1.272 for Butterfly, 1.618 for Crab).
• Far edge: the next defining ratio in the overshoot direction (0.886 for Gartley, 1.13 for Bat, 1.618 for Butterfly, 1.618 + 0.5 × ATR for Crab).

Band width is typically 0.5–1.5 × ATR. A narrow band (under 0.3 × ATR) means unusual precision; a wide band (over 1.5 × ATR) means loose ratios and a low-quality pattern.

The three-order scaled entry

• Order 1: 40% at the near edge.
• Order 2: 35% at the midpoint of the PRZ.
• Order 3: 25% at the far edge.

If only order 1 fills and price reverses, you trade 40% size with a tighter effective entry. If all three fill, your blended entry is the PRZ midpoint at full size.

The volatility-adjusted stop

• Stop distance: 0.30 × ATR20 beyond the far edge of the PRZ.
• Hard invalidation: a close beyond the far edge + 0.30 × ATR voids the trade.

The 0.30 × ATR buffer absorbs normal completion noise. A close beyond it means the PRZ has failed, not that price wiggled.

Partial invalidation: halving at the far edge

The rule that separates this from naive PRZ trading:

• If price fills orders 1 and 2 then breaches the far edge without closing beyond the hard invalidation, do nothing — the PRZ is still alive.
• If price fills orders 1 and 2 and then closes beyond the far edge + 0.15 × ATR, close 50% of the filled position and move the stop on the remainder to the hard invalidation level.

This caps the loss on a failing PRZ without committing to a full stop-out, which often fires just before the actual reversal.

Worked example: Gartley PRZ

X = $100, A = $80 (XA = $20). Gartley PRZ: near edge at 0.786 = $84.28, far edge at 0.886 = $82.28. ATR20 = $3.00.

• Order 1 (40%): limit at $84.28.
• Order 2 (35%): limit at $83.28 (midpoint).
• Order 3 (25%): limit at $82.28 (far edge).
• Stop: $82.28 − (0.30 × $3.00) = $81.38.
• Partial invalidation: close below $82.28 + (0.15 × $3.00) = $82.73 → close 50% of filled.

Scenario B: price fills all three. Blended entry $83.28, full size, stop $81.38. Risk $1.90 per share.

Scenario C: price fills orders 1 and 2 (avg $83.78), then closes below $82.73. Close 50% at $82.73 (−$1.05 on half). Hold the rest, stop at $81.38. If price reverses, the held half profits; if it stops, total loss is reduced versus a full stop-out.

Why the partial invalidation pays

Backtests on daily harmonic data show roughly 22% of PRZs that breach the far edge by less than 0.15 × ATR subsequently reverse to target 1. A full stop-out at the far edge surrenders those wins. The partial invalidation keeps 50% exposure to the reversal while capping the downside — the math favours patience inside the zone over a single hard stop.

The PRZ is a probability band, not a target. Scale in, let the fills come to you, manage the partial invalidation mechanically.