{
  "timeframe": "15m",
  "family": "ema_cross",
  "direction": "long",
  "fast": 9,
  "slow": 21,
  "rsi_period": 14,
  "rsi_low": 30,
  "rsi_high": 70,
  "lookback": 20,
  "stop_pct": 2.0,
  "target_pct": 4.0,
  "margin": 500.0,
  "leverage": 1.0,
  "max_hold_hours": 48,
  "explanation": "Authored frozen example, not a historical AI model decision.",
  "unsupported": []
}