Happy Devil: MT4 Auto-Fibonacci Indicator for Clear Retracement Signals and Entries

This Happy Devil review offers a 2026 performance analysis based on documented runs and live-demo comparisons, focusing on how the indicator impacts decision making and trade outcomes. Happy Devil stands out by eliminating hand-drawn subjectivity: it identifies market swings automatically, draws blue boundary lines for 0.0% and 100.0% levels, flags the red 61.8% golden ratio, and plots white secondary retracement levels including 23.6%, 38.2%, 50.0% and 78.6%. The visual legend and auto-extend right feature keep chart clutter low on multi-day timeframes. The algorithm detects pivot swings using price action thresholds and time filters, then calculates retracement overlays with optional confirmation conditions tied to moving averages or momentum oscillators. Happy Devil is most effective in trending markets with clear swing structures and moderate volatility, where Fibonacci levels often act as confluence support or resistance. The indicator includes basic risk guidance rather than automated money management, so users must apply position sizing and stop levels manually or pair the indicator with an EA for execution. Expected performance characteristics include a focus on higher-probability retracement entries near 61.8, moderate trade frequency depending on timeframe settings, and repeatable signal behavior that facilitates backtesting. Pui Yan Leung built Happy Devil for MT4 as an indicator priced at $100 with a 4.5/5 rating from 100 reviews on public marketplaces, emphasizing transparency and reproducible conditions rather than black-box optimization.