Gap Professional EA MT4 – Weekend Gap Trading Strategy for GBPJPY

Gap Professional EA is a weekend gap trading system for MT4, targeting GBPJPY on the H1 timeframe by capturing price reversion after Sunday open gaps.

A 90% modeling quality backtest over 2018–2020 recorded a 3.47 profit factor with 68.83% win rate across 77 trades — indicating a repeatable edge when gaps form at sufficient size.

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Key Highlights

• ✅ Gap-size filter blocks low-probability entries — only trades gaps above 50 points minimum
• ✅ Backtest profit factor of 3.47 over 2 years at 90% modeling quality on GBPJPY H1
• ✅ Candle-extreme trailing stop locks profits as gap fills — no fixed exit left to chance
• ✅ Automatic lot sizing scales position with free margin — no manual recalculation needed
• ✅ Broker-dependent gap behavior requires per-broker optimization — developer provides direct tips

*This EA runs on MT4 only. Need an MT5 gap or reversion strategy? Browse MT5 EAs.*

Backtest Performance Results

The primary backtest ran on GBPJPY H1 from January 2018 to February 2020 at 90% modeling quality. Across 77 trades, the test returned a profit factor of 3.47 with 68.83% of trades closing in profit. Long positions won 78.18% of the time versus 45.45% for shorts — reflecting GBPJPY’s asymmetric gap-fill behavior on the long side during this period.

A second backtest pass on the same pair and period using build 1262 (GA Professional MT4 1.0) produced a profit factor of 3.29 across 95 trades with 83.08% win rate. The relative drawdown reached 56.14% in this run — a meaningfully different risk profile from the first pass, suggesting parameter sensitivity worth testing on your broker’s data.

Maximum drawdown hit 58.17% in the first backtest — driven by consecutive gap-reversion failures when GBPJPY extended rather than filled. Control this by capping the automatic lot size (reduce the “Lot for 1000 units” setting below 2.0), starting with $500+ capital per 0.01 lot, and monitoring gap size relative to current volatility. At conservative sizing, drawdown periods historically resolved within the test window; at default aggressive sizing, peak drawdown reached the levels shown above.

Backtest results differ from live trading due to slippage, spread variation, and broker-specific gap behavior. Demo validation required for a minimum of 60 days before live deployment — gap frequency varies by broker and market regime.

How Gap Professional EA Works

Strategy: Weekend gap reversion on GBPJPY H1 — enters when Sunday open creates a price gap above 50 points, expecting mean reversion toward Friday close.

Entry: Gap exceeds minimum point threshold; tick criterion disabled by default for immediate entry on gap detection.

Exit: Take profit set at 0.8× gap size (coefficient); trailing stop by candle extremes activates immediately to protect open profit.

Risk Control: Automatic lot sizing at 2.0 lots per 1,000 free margin units; initial stop loss at 150 points; trailing step 30 points.

✅ Best conditions: Large Sunday gaps (50+ points) • Trending GBPJPY with regular gap-fill behavior • Low Sunday-open spread brokers

⚠️ Caution: Brokers with minimal weekend gaps (gaps vary significantly by liquidity provider) • High-volatility Sunday opens where gap extends rather than fills

Technical Specifications

This EA is MT4 only. Need an MT5 platform alternative? Browse MT5 EAs.

Who Should Use This EA

✅ Ideal for:

• MT4 traders who want a low-frequency strategy (typically 1–4 trades per month)
• Traders willing to optimize gap threshold settings per their specific broker’s data
• Accounts with $500+ capital running conservative lot sizing (below default 2.0)
• Traders who can engage directly with the developer (Vadim) for broker-specific setup tips

✅ Best results when:

• Your broker consistently shows GBPJPY gaps of 50+ points on Sunday open
• You run a 60-day demo first to confirm gap frequency on your specific broker feed

Download Package Included

• ✅ Experts:
  • Gap Professional EA V1.4 (.ex4)
• ✅ Presets:
  • MT4_Alpari_AUDUSD_H1.set
  • MT4_Alpari_EURUSD_H1.set
  • MT4_Alpari_GBPJPY_H1.set
  • MT4_Alpari_GBPUSD_H1.set
  • MT4_Alpari_USDCAD_H1.set
  • MT4_ICMarkets_AUDUSD_H1.set
  • MT4_ICMarkets_EURUSD_H1.set
  • MT4_ICMarkets_GBPJPY_H1.set
  • MT4_ICMarkets_GBPUSD_H1.set
  • MT4_ICMarkets_USDCAD_H1.set
• ✅ Installation and setup guide

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Frequently Asked Questions