[
  {
    "expression": "ts_mean(ts_mean(operating_income / return_assets, 4), 20)",
    "time_consuming": 105.39,
    "formatted_time": "1分45.39秒",
    "alpha_id": "O0kJWQ7Y",
    "status": "success",
    "description": "/",
    "simulation_timestamp": "2026-03-20 12:00:05",
    "performance_metrics": {
      "sharpe_ratio": null,
      "annual_return": null,
      "annual_volatility": null,
      "max_drawdown": null,
      "information_ratio": null,
      "total_return": null
    },
    "risk_metrics": {
      "turnover": null,
      "score": null,
      "specific_return": null,
      "specific_risk": null,
      "tail_ratio": null,
      "common_ratio": null
    },
    "quantile_metrics": {
      "top_minus_bottom": null,
      "top_decile_return": null,
      "bottom_decile_return": null,
      "ic": null,
      "ic_decay": null
    },
    "other_metrics": {
      "capacity": null,
      "fitness": null,
      "instrument_count": null,
      "start_date": null,
      "end_date": null
    }
  }
]