| Signal Generation | Fibonacci-based XABCD patterns identifying potential reversal zones |
| Entry Trigger | Price reaches Potential Reversal Zone (PRZ) with candlestick confirmation |
| Exit Strategy | Fibonacci retracement targets of CD leg or full pattern projection |
| Risk Management | Stop-loss beyond PRZ invalidation level with tight risk control |
| Position Sizing | Risk 1-1.5% per trade due to precise entry zones |
| Optimal Conditions | Clear swing structure, pattern ratios within tolerance, volume confirmation at PRZ |
| Avoid When | Ratios significantly outside tolerance, choppy price action, major news pending |
| Timeframes | Hourly to daily for futures; 15-minute for intraday scalping |
| Market Context | Harmonic patterns form reliably in the FTSE China A50 and Nikkei 225 due to high liquidity and institutional participation. Gartley and Bat patterns are most common during range-bound phases. Butterfly and Crab patterns often appear at major swing highs/lows. SGX FX futures (USD/CNH, USD/SGD) also show excellent harmonic formations. |
| Regulatory Considerations | SGX-DC margin requirements apply to all harmonic trades. Positions held into the T+1 night session or overnight require full exchange margin throughout. Harmonic trades often require precision timing which may span multiple sessions; contracts are listed on SGX-DT and regulated by MAS under the Securities and Futures Act. |
| Tax Implications | Singapore has no capital gains tax and no securities transaction tax or stamp duty on exchange-traded derivatives. A swing approach is generally treated as non-taxable investment, whereas frequent intraday trading may be assessed by IRAS as a taxable trade under the 'badges of trade'. Maintain detailed logs of pattern identification and trade rationale. |
| Timing Considerations | Best harmonic completions occur around the active underlying cash sessions (e.g. the China A-shares open for the A50, Tokyo for the Nikkei) when participation is highest. PRZ tests during thin periods - such as the lunch break in the underlying cash market or deep in the T+1 night session - have higher failure rates. Avoid trading completions in the final minutes of a session unless planning to hold. |
| Local Market Factors | Foreign institutional positioning influences pattern validity at major levels. SGX index futures run a near-24-hour T and T+1 session, so a US or European overnight move can cause a pattern to complete with a gap at the night-session reopen or the next cash open, requiring adjusted entry. The quarterly roll week can distort harmonic ratios - use wider tolerance. |
| Brokerage Impact | Harmonic trades typically have favorable risk-reward (1:2 to 1:4), making per-trade commission insignificant relative to profits. Precision entries reduce slippage impact. Note there is no STT on SGX derivatives. |
Gartley has B at 0.618 XA and D at 0.786 XA. Bat has shallower B (0.382-0.50 XA) and deeper D (0.886 XA). Both are retracement patterns where D stays within XA range. Bat often offers a second entry opportunity when Gartley D fails but price holds above X.
Fibonacci ratios (0.382, 0.618, 0.786, etc.) appear throughout nature and financial markets. They represent natural proportion and retracement/extension levels. When multiple Fibonacci levels converge at a single zone (PRZ), it creates a mathematical harmony that often precedes reversals.
For Gartley and Bat patterns, stop-loss goes beyond point X with a small buffer. If D is at 0.786 XA and price reaches X exactly, the pattern is invalidated. Add 0.03-0.05 XA distance as buffer beyond X to avoid premature stopouts.
Validate each ratio: B should match the pattern type's requirement (0.618 for Gartley, 0.382-0.50 for Bat, 0.786 for Butterfly). C should retrace 0.382-0.886 of AB. D should project to the correct XA level. Allow +/-2% tolerance. If ratios don't match, it's not a valid pattern.
Yes, harmonic patterns form on all timeframes. Daily charts provide clearest patterns for swing trading. Hourly works for intraday futures. 15-minute can be used for scalping but has more noise. Higher timeframes are generally more reliable but require longer holding periods.
Real markets rarely produce textbook patterns. For Grade B patterns (ratios within 2-3% of ideal): widen PRZ slightly, reduce position size by 25-50%, require stronger candlestick confirmation. For ratios outside 3% tolerance, consider the pattern invalid and look elsewhere.
PRZ confluence occurs when multiple Fibonacci projections (XA retracement, BC extension, AB=CD) converge at the same zone. The tighter this convergence, the more powerful the potential reversal. Additional confluence from structural support/resistance, round numbers, or moving averages further strengthens the zone.
It depends on pattern quality and risk tolerance. Aggressive: enter as price touches PRZ. Moderate: wait for first reversal candle (engulfing, hammer, etc.). Conservative: wait for breakout of first swing from PRZ. Higher quality patterns (Grade A) can use aggressive entry; weaker patterns need confirmation.
Higher timeframes provide direction and context. A Gartley on hourly has higher probability if the daily shows a pattern completing at the same zone (nested pattern). Always trade in the direction of higher timeframe patterns. Use lower timeframes for precision entry within the larger PRZ.
Gartley: 1:2 to 1:3 (moderate). Bat: 1:2.5 to 1:3.5 (good, tighter stop due to deeper D). Butterfly: 1:2 to 1:3 (moderate, wider stop). Crab: 1:3 to 1:5 (best, very tight stop at 1.618). The Crab's precision requirement creates excellent risk-reward.
Start with swing point detection using Williams Fractals or ZigZag. Work backward from current price to identify XABCD structure. Calculate leg ratios and compare against pattern templates with tolerance. Use efficient algorithms for real-time detection. Key parameters: swing sensitivity, ratio tolerance, minimum pattern size.
Look for: declining momentum (weakening delta) approaching PRZ, absorption at PRZ (passive orders absorbing aggressive orders), delta reversal at PRZ (shift from negative to positive or vice versa). These microstructure signals confirm institutional participation at the reversal zone.
Harmonic patterns often complete at Elliott Wave termination points. Gartley/Bat at Wave 2 (0.618-0.786 Wave 1) signals Wave 3 beginning. Patterns at Wave 4 signal Wave 5 start. ABC corrections often end with harmonic patterns. When both frameworks align, probability significantly increases.
Debit spreads align well with harmonics. Buy ATM option, sell OTM option at T1/T2 target level. This provides defined risk (premium paid) matching the harmonic stop concept, with profit aligned to expected pattern move. Buy options when IV is low at PRZ for additional edge.
Use walk-forward optimization (optimize on 60%, test on 40%, roll forward). Keep parameters minimal. Test parameter sensitivity (small changes shouldn't cause large performance swings). Use Monte Carlo simulation for robustness testing. Always maintain out-of-sample data for final validation.
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