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1. INTRODUCTION

PiercingLineTradingSystem 1.00

2-Bar Bullish Reversal Sample with Penetration-Depth Evaluation

Writer: Ich Khiem Nguyen | MQL5: https://www.mql5.com/en/customers/khiemni/vendor

What’s PiercingLineTradingSystem?

PiercingLineTradingSystem detects Piercing Line candlestick patterns in your MetaTrader 5 charts routinely. The indicator evaluates every accomplished bar pair towards six structural gates, scores surviving patterns throughout six weighted high quality components, and enters instantly on the shut of the sign candle when a sound Piercing Line is confirmed. Entry value, cease loss, and take revenue ranges are drawn instantly on the chart so you’ll be able to assess the commerce quite than carry out the calculations manually.

What Is a Piercing Line Sample?

A Piercing Line is a two-candle bullish reversal formation that seems after a downtrend. The primary candle is a Lengthy Black (bearish) candle that establishes a baseline. The second candle opens beneath the shut of the primary candle (a dislocation hole), then closes above the 50% midpoint of the primary candle’s physique however stays beneath the primary candle’s open, finishing the reversal sign.

The Piercing Line alerts renewed shopping for momentum after a promoting section. Moderately than instantly closing above the primary candle (which might create an Engulfing sample), the second candle’s partial penetration into the primary candle’s physique represents a measured restoration — consumers are stepping in however haven’t but overcome all sellers. This construction is extra widespread than full Engulfing and infrequently precedes continuation of the upward transfer.

Bulkowski’s analysis ranks the Piercing Line at 13 out of 103 candlestick patterns with a 64% reversal price. The Piercing Line is the bullish counterpart of the Darkish Cloud Cowl (bearish) sample.

Bullish Piercing Line

Seems after a downtrend. Bar 1 is a Lengthy Black candle (massive bearish physique). Bar 2 opens beneath close1 (dislocation), then closes above the 50% midpoint of bar 1’s physique, confirming that consumers have absorbed the promoting and begun pushing value greater. When this construction varieties after at the least two declining bars, the indicator classifies it as a Piercing Line.

Downtrend Context Detection

The indicator examines the three bars instantly earlier than bar 1 of the potential sample. If at the least two of these bars are declining (decrease closes), the sample is classed as a Piercing Line. If the context is ambiguous — fewer than two declining bars — the indicator defaults to detecting based mostly on whether or not the primary candle is bearish sufficient (Lengthy Black physique). The Bulkowski statistics (64% reversal price) are based mostly on downtrend context.

How the Indicator Finds Patterns

The indicator evaluates every potential two-bar sample towards six sequential gates. All six should go for a sign to be generated.

1. Bar 1 Course gate: Bar 1 have to be bearish (shut < open). This establishes the downtrend setup.

2. Bar 1 Lengthy Black gate: Bar 1’s physique should characterize at the least the minimal required physique/ATR a number of (Customary: 0.25×, Strict: 0.50×). This confirms that bar 1 is a big bearish candle, not a small doji.

3. Bar 1 Physique Ratio gate: Bar 1’s physique should characterize at the least the minimal required fraction of complete vary (Customary: 50%, Strict: 65%). This confirms that the bearish transfer dominated the candle construction.

4. Bar 2 Dislocation gate: Bar 2’s open should fall beneath bar 1’s shut by at the least the minimal dislocation quantity (Customary: 0.02× ATR, Strict: 0.05× ATR). This hole down opening alerts a continuation of promoting earlier than consumers step in.

5. Bar 2 Penetration gate: Bar 2’s shut should exceed the 50% midpoint of bar 1’s physique (penetration > 0.50). This confirms that consumers have pushed again into bar 1’s vary, establishing the reversal construction.

6. Bar 2 NOT Engulfing gate: Bar 2’s shut should stay beneath bar 1’s open (close2 < open1). If close2 >= open1, the sample is a Bullish Engulfing (a unique sample with greater conviction) quite than a Piercing Line.

Solely candles passing all six gates proceed to high quality scoring and sign registration.

High quality Rating — Evaluating Sample Energy

Each sample that clears detection receives a high quality rating between 0.00 and 1.00. Six components contribute to this rating, every weighted by its contribution to the Piercing Line’s reversal reliability.

High quality Elements

QF-1 (Penetration Depth) carries the best weight (0.35) as a result of the depth to which bar 2 penetrates bar 1’s physique is the core structural requirement of the Piercing Line — deeper penetration signifies stronger purchaser confidence and dedication.

Rating Grades

• Grade A (0.80 – 1.00) — Wonderful: Bar 2 closes close to or above bar 1’s midpoint with massive dislocation hole and substantial bar 1 physique
• Grade B (0.60 – 0.79) — Good: Dependable setups with strong penetration and significant physique metrics
• Grade C (0.40 – 0.59) — Common: Legitimate construction however penetration is average; use with extra affirmation
• Grade D (0.20 – 0.39) — Under Common: Marginal setup; greater false sign danger
• Grade F (0.00 – 0.19) — Poor: Keep away from buying and selling these alerts

High quality Threshold

The default minimal high quality is 0.30. Adjusting this threshold adjustments which patterns seem on the chart:

• 0.50 – 0.65: Reveals solely essentially the most structurally sound Piercing Strains with robust penetration depth and huge dislocation gaps — fewer alerts with greater per-signal high quality
• 0.20 – 0.30: Reveals extra alerts together with weaker penetration examples — helpful for analysis or finding out the sample throughout totally different market situations
• Tip: Begin with the default 0.30 in your chosen image and timeframe and observe a number of dozen alerts earlier than adjusting

Entry Mode: Fast

Piercing Line patterns use rapid entry on the shut of bar 2 (the sign candle) quite than pending cease orders. When a sound Piercing Line is confirmed on bar shut, the system enters the commerce at that second quite than ready for a breakout above bar 1’s open.

This displays the character of the sample: bar 2’s shut above the 50% midpoint is the sign occasion. Ready for a breakout would delay entry past the affirmation level. Fast entry captures the transfer as outlined by the sample’s construction.

Buying and selling Ranges

Bullish Piercing Line:

• Entry = shut of bar 2 (the sign candle)
• Cease Loss = sample low − 0.25×ATR

The sample low is the minimal of bar 1’s low and bar 2’s low. The cease loss buffer of 0.25×ATR is positioned past this excessive. A break beneath the sample low invalidates the reversal premise.

Take revenue ranges are calculated from entry utilizing configurable risk-reward multiples (default: 1R, 2R, 3R, 5R from entry to cease distance).

What You See on the Chart

When a Piercing Line sample passes all detection gates and high quality filters, the indicator attracts the next:

Sign Markers

• Arrow icons: Inexperienced upward arrows mark Piercing Line patterns. Grey arrows point out alerts blocked by an energetic filter such because the Reverse Sign filter.
• High quality labels: A numeric rating (e.g., “0.72”) seems close to every sign, exhibiting how the sample ranked throughout all six high quality components.

Buying and selling Strains

• Entry line: An orange horizontal line on the rapid entry stage — the shut of bar 2
• Cease Loss line: A crimson horizontal line labeled “SL” — positioned beneath the sample low with an ATR buffer
• Take Revenue strains: As much as 4 inexperienced horizontal strains labeled TP1 via TP4, spaced at configurable R:R multiples from the entry stage

Visible Zones

• Sample spotlight: A shaded rectangle spans each bars of the Piercing Line, making it straightforward to determine which pair triggered the sign. The chance zone between entry and SL is shaded in crimson; reward zones between entry and every TP stage are shaded progressively lighter.
• Monitoring dots: Small coloured dots replace because the sign state adjustments — white for pending (rapid entry, monitoring), yellow for energetic, inexperienced for goal hit, crimson for cease hit.

Sign Lifecycle

1. Energetic: Fast entry positioned at bar 2 shut — commerce is dwell
2. Goal Hit: Value reached a take revenue stage
3. Cease Hit: Value reached the cease loss
4. Cancelled: Sign invalidated earlier than shut

Settings You Can Modify

Detection Parameters

Detection Preset Values

Customized Threshold Parameters

Settings Suggestions

• Start with the Customary preset and default high quality threshold in your chosen image; observe at the least two to 3 weeks of alerts earlier than adjusting
• If Customary produces too many alerts on XAUUSD H1, elevate Min High quality to 0.50 quite than switching to Strict — this preserves detection sensitivity whereas filtering out weaker structural examples
• The dislocation gate (0.02× ATR Customary) permits small gaps; on unstable devices, enhance to 0.03 for extra pronounced reversals
• Keep away from chopping the SL buffer beneath 0.20×ATR — the sample low is the logical invalidation level for the reversal, and a few retesting of that stage is regular earlier than the transfer develops

Greatest Timeframes and Markets

Really useful Timeframes

• H1 — High quality: Excessive | Frequency: Medium | Greatest for: Day merchants looking for clear reversal setups at intraday help and resistance ranges; beneficial start line
• H4 — High quality: Excessive | Frequency: Decrease | Greatest for: Swing merchants who need well-formed Piercing Line patterns with robust follow-through potential
• M15 — High quality: Medium | Frequency: Excessive | Greatest for: Scalpers wanting frequent Piercing Line alerts throughout energetic session hours
• D1 — High quality: Highest | Frequency: Low | Greatest for: Place merchants looking for textbook Piercing Line formations at main every day construction ranges

Greatest Markets

• XAUUSD (Gold): Piercing Line patterns on H1 and H4 continuously mark important intraday reversal factors, significantly throughout London and New York session crossovers
• Main foreign exchange pairs (EURUSD, GBPUSD, USDJPY): Piercing Line formations are widespread at key intraday ranges, particularly close to spherical numbers and session open costs
• Indices (US30, NAS100): Piercing Line patterns close to prior lows can mark intraday turning factors after sharp sell-offs
• Oil (USOIL): Sturdy Piercing Line formations seem after sharp downward strikes on H1 and H4

The indicator works on any image and timeframe. H1 with the Customary preset on XAUUSD is the beneficial beginning configuration.

Getting Began — Fast Setup

1. Open MetaTrader 5 and cargo a chart (XAUUSD on H1 is an effective start line)
2. Within the Navigator panel (Ctrl+N), develop Indicators → Customized and find PiercingLineTradingSystem
3. Drag the indicator onto the chart
4. Within the settings dialog, choose Detection Preset (Customary beneficial for first use) and click on OK — the indicator will scan historical past and show detected patterns instantly
5. Observe the alerts: inexperienced upward arrows point out Piercing Line patterns
6. Examine the standard rating on every sign — deal with patterns scoring 0.50 or greater when beginning out
7. Non-compulsory: Allow alerts within the ALERTS part to obtain notifications when new patterns kind in real-time

All Options at a Look

• Automated Bullish Piercing Line two-candle detection on any image and timeframe
• 6-gate structural detection: bar 1 path, bar 1 lengthy black physique/ATR, bar 1 physique ratio, bar 2 dislocation, bar 2 penetration depth (HARD RULE), bar 2 not engulfing
• 6-factor weighted high quality scoring (penetration depth 0.35, physique/ATR 0.25, dislocation ATR 0.20, physique ratio 0.10, relative physique 0.05, path modified 0.05)
• Downtrend context detection utilizing 3-bar prior value motion: downCount >= 2 → Piercing Line
• 3 detection presets: Customary, Strict, Customized (user-defined thresholds)
• Fast entry at bar 2 candle shut (not pending order)
• Sign states and lifecycle monitoring
• High quality filter to suppress weak patterns beneath threshold
• Excessive zone filter (overbought/oversold rejection)
• Stoploss hunt filter (liquidity sweep validation)
• Reverse sign filter (stop conflicting alerts)
• Threat/Reward with 3 cease loss strategies (Donchian Channel, ATR, Sample)
• As much as 4 take revenue ranges (TP1-TP4) at configurable R:R ratios
• Donchian Channel trailing cease loss
• MTF Scanner (as much as 150 symbols × 8 timeframes)
• Market construction evaluation (BOS / CHOCH)
• 4-channel alert system (popup, sound, push, electronic mail)
• Sign statistics dashboard
• Skilled chart themes (Darkish, Mild, Customized)
• EA sign buffers for automated buying and selling

For detailed guides on every characteristic, see the MANUAL included with the indicator.

Widespread Questions

Q: What’s the distinction between a Piercing Line and a Bullish Engulfing?

Each patterns characteristic bar 2 closing greater than bar 2 opened. In a Piercing Line, bar 2’s shut stays beneath bar 1’s open (close2 < open1), leaving a part of bar 1 unengulfed — this measured restoration suggests a gradual shift from sellers to consumers. In a Bullish Engulfing, bar 2 closes above bar 1’s open, utterly closing inside bar 1’s vary — this represents full purchaser dominance and sometimes carries greater conviction. The Piercing Line is extra widespread and has a 64% reversal price versus Engulfing’s sometimes greater price.

Q: Why does the indicator use rapid entry as an alternative of a Purchase Cease?

The Piercing Line’s defining characteristic is that bar 2 closes above the 50% midpoint of bar 1’s physique — the reversal sign happens at bar shut, not at a breakout stage above bar 1’s open. Ready for value to interrupt above bar 1’s open would delay entry nicely after the sign occasion. Fast entry at bar 2 shut captures the transfer as outlined by the sample’s construction and typical market conduct following the sample.

Q: Why is the penetration depth gate described as essential?

Penetration depth (how far bar 2 closes into bar 1’s physique) is the core structural requirement of the Piercing Line. It represents the conviction of the reversal: deeper penetration signifies that consumers have confidently pushed again into the sellers’ territory, establishing real reversal momentum. Patterns with deep penetration (near or above the 75% stage of bar 1’s physique) rating considerably greater as a result of they exhibit stronger purchaser dedication.

Q: What does “downtrend context” imply for the Piercing Line?

The indicator checks the three bars earlier than bar 1 of the potential sample. For a sample to be categorized as a Piercing Line, at the least two of these bars have to be declining (decrease closes). This ensures the sample varieties in an precise downtrend quite than throughout a consolidation. The Bulkowski statistics (64% reversal price) are based mostly on this downtrend context.

Q: What if each Bullish and Bearish alerts seem on the identical space?

If the Reverse Sign filter is enabled (InpOppositeFilter = true), the indicator prevents conflicting alerts from being registered concurrently. When a sign in the wrong way is already energetic, new alerts will both be blocked fully or proven as grey blocked arrows relying on the InpShowBlockedIndicator setting. For Piercing Line, this protects towards bearish patterns (Darkish Cloud Cowl) showing on the similar bar pair.

Q: How do I scale back the variety of alerts?

Elevate the Min High quality threshold to 0.50 or greater. You may also swap to the Strict preset (tighter physique and dislocation thresholds), allow the Course Filter to limit alerts to the dominant development path, or allow the Excessive Zone Filter to dam alerts close to overbought extremes.

What’s New — Model 1.00

That is the preliminary launch of PiercingLineTradingSystem. Key options embody:

• Piercing Line bullish two-candle detection utilizing 6-gate structural validation with hard-rule penetration depth enforcement
• 6-factor weighted high quality scoring with penetration depth dominance (0.35 weight) rewarding deep reversals
• Downtrend context detection from 3-bar prior value motion to tell apart Piercing Line from weak reversals
• Customary and Strict presets, plus absolutely customizable Customized threshold mode
• Fast entry at bar 2 candle shut — no pending cease order required
• 7-layer filter chain (High quality, Excessive Zone, Course, Stoploss Hunt, Sign Zone, Market Construction, Reverse Sign)
• Multi-timeframe scanner masking as much as 150 symbols and eight timeframes concurrently
• Automated Entry/SL/TP ranges with Donchian Channel trailing cease
• 4-channel alert system (popup, sound, push notification, electronic mail)
• EA sign buffers enabling automated buying and selling techniques to devour Piercing Line alerts through iCustom()
• Skilled chart themes (Darkish, Mild, Customized) for prolonged buying and selling periods

Getting Assist

When you’ve got questions or want help:

Able to Begin?

PiercingLineTradingSystem identifies the structural second when consumers push again right into a downtrend by opening beneath the prior shut and shutting above the midpoint of that bearish candle. Connect the indicator to your chart, begin with the Customary preset on XAUUSD H1, and observe how the penetration depth aligns with the reversals you’d determine manually.

Blissful buying and selling!

Ich Khiem Nguyen

PiercingLineTradingSystem 1.00 — Created 2026-02-24