Comprehensive Price Action Study: Systematic Short Bias and Failure of Bullish Hammers
π Comprehensive Price Action Study β 7 Patterns Γ 3 Assets Γ 2 TFs
Executive Summary
We conducted a systematic statistical and backtest sweep of 7 classical Price Action (PA) patterns across BTC, ETH, and SOL on 15m and 1h timeframes (covering up to 208 days of historical 1m/15m/1h data).
Our primary finding is a pervasive and systematic SHORT bias across all assets. While bearish patterns (e.g. Session Sweep Short, Inside Bar Breakout Down) carry statistically significant positive expectancy, classical bullish patterns (e.g., Bullish Pin Bars/Hammers) consistently fail and yield negative expectancy.
π Key Findings
1. The "Hammer" Trap (Bullish Pin Bars Fails)
One of the most robust findings is that Bullish Pin Bars (Hammers) consistently lose money across BTC, ETH, and SOL.
- ETH 1h Bullish Pin Bar: Mean return of -0.849% (p-value = 0.0064) over 223 occurrences.
- SOL 1h Bullish Pin Bar: Mean return of -0.680% (p-value = 0.0395) over 227 occurrences.
- BTC 1h Bullish Pin Bar: Mean return of -0.471% (p-value = 0.0310) over 227 occurrences.
Retail traders buying "support hammers" are systematically hunted, providing liquidity for institutional selling.
2. Contrarian Advantage (Pin Bar Contrarian)
By fading the retail crowdβi.e., shorting bullish pin bars and longing bearish pin barsβwe found a tradable edge that survives commission drag (4.4 bps Hyperliquid taker).
- ETH 1h (Fading both): +5.59% total return (Sharpe 0.33, 208 trades, Max DD 1.72%) at 2.0% TP / 2.0% SL.
- SOL 1h (Short-only bullish pin): +5.08% total return (Sharpe 0.35, 155 trades, Max DD 2.85%) at 2.5% TP / 1.5% SL.
- BTC 1h (Short-only bullish pin): +3.63% total return (Sharpe 0.27, 137 trades, Max DD 2.38%) at 2.5% TP / 1.5% SL.
3. Session Sweep Short (Liquidity Sweeps)
Sweeping the previous session extremes (24-bar high/low) and closing back inside shows strong statistical significance:
- SOL 1h Session Sweep Short: Mean return of +0.894% (p-value = 0.0018) over 199 signals.
- BTC 1h Session Sweep Short: Mean return of +0.547% (p-value = 0.0019) over 225 signals.
- Backtesting this on SOL 1h yielded a positive return of +1.54% after commissions.
π Strategy Implementation (Optimal ETH Setup)
The fading strategy is deployed in production under live_pin_contrarian_1h.py with the following configuration:
{
"entry_rules": [
{
"condition": "pin_contra == 1.0",
"direction": 1,
"signal": "shooting_star_long"
},
{
"condition": "pin_contra == -1.0",
"direction": -1,
"signal": "hammer_short"
}
],
"exit_rules": [],
"max_hold_bars": 48,
"position_size": 0.15,
"stop_loss_pct": 0.02,
"take_profit_pct": 0.02
}
π Research Trail & Methodology
- Feature Extraction: Generated indicators for Engulfing, Pin Bars, Engulfing+RSI, Inside Bar Breakout, Fair Value Gaps (FVG), Session Sweeps, and Volume Climaxes.
- Horizon Analysis: Computed forward log returns across 3, 6, 12, 16, 24, and 48 bars.
- Statistical Significance: Used t-tests to isolate patterns with p < 0.10.
- Execution Validation: Simulated backtests using the RLXBT Engine with a realistic Hyperliquid taker fee of 4.4 bps (roundtrip 8.8 bps).
π Lessons Learned
- Timeframe Scaling: On 1m data, commissions drag down all edges. Moving to 1h allowed wider targets (2.0%), shrinking the commission drag relative to the stop-loss from 30% to only 4.4%.
- Short-Side Edge: The crypto market perpetual funding skew and retail bullish biases create a structural short edge on microstructural reversals.
- Fading Retail Works: Bullish Pin Bars are reliable liquidation/stop-hunt targets. Fading them is a robust, cross-asset universal edge.
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