{
  "spot_usdt": {
    "asset": "BTC-USDT",
    "market_type": "spot_usdt",
    "generated_at_ms": 1700000000000,
    "reference_price": 100.495,
    "bucket_size": 0.995,
    "expected_venues": [
      "binance",
      "okx",
      "bybit"
    ],
    "venue_count": 3,
    "coverage": 1,
    "bid_levels": [
      {
        "side": "bid",
        "price_low": 98.505,
        "price_high": 99.5,
        "price_mid": 99.0025,
        "depth_quote": 2400.0,
        "venue_count": 3,
        "venue_depth_quote": {
          "binance": 816.0,
          "bybit": 792.0,
          "okx": 792.0
        },
        "hhi": 0.3334,
        "persistence": 0.67,
        "spoof_risk_proxy": 0.05,
        "vacuum_score": 0
      },
      {
        "side": "bid",
        "price_low": 97.51,
        "price_high": 98.505,
        "price_mid": 98.0075,
        "depth_quote": 240.0,
        "venue_count": 1,
        "venue_depth_quote": {
          "binance": 240.0
        },
        "hhi": 1,
        "persistence": 0.35,
        "spoof_risk_proxy": 0.7,
        "vacuum_score": 0.9
      }
    ],
    "ask_levels": [
      {
        "side": "ask",
        "price_low": 101.49,
        "price_high": 102.485,
        "price_mid": 101.9875,
        "depth_quote": 2160.0,
        "venue_count": 2,
        "venue_depth_quote": {
          "binance": 1080.0,
          "okx": 1080.0
        },
        "hhi": 0.5,
        "persistence": 0.61,
        "spoof_risk_proxy": 0.15,
        "vacuum_score": 0.1
      },
      {
        "side": "ask",
        "price_low": 102.485,
        "price_high": 103.48,
        "price_mid": 102.9825,
        "depth_quote": 216.0,
        "venue_count": 1,
        "venue_depth_quote": {
          "bybit": 216.0
        },
        "hhi": 1,
        "persistence": 0.35,
        "spoof_risk_proxy": 0.7,
        "vacuum_score": 0.91
      }
    ],
    "top_bid_wall": {
      "side": "bid",
      "price_low": 98.505,
      "price_high": 99.5,
      "price_mid": 99.0025,
      "depth_quote": 2400.0,
      "venue_count": 3,
      "venue_depth_quote": {
        "binance": 816.0,
        "bybit": 792.0,
        "okx": 792.0
      },
      "hhi": 0.3334,
      "persistence": 0.67,
      "spoof_risk_proxy": 0.05,
      "vacuum_score": 0
    },
    "top_ask_wall": {
      "side": "ask",
      "price_low": 101.49,
      "price_high": 102.485,
      "price_mid": 101.9875,
      "depth_quote": 2160.0,
      "venue_count": 2,
      "venue_depth_quote": {
        "binance": 1080.0,
        "okx": 1080.0
      },
      "hhi": 0.5,
      "persistence": 0.61,
      "spoof_risk_proxy": 0.15,
      "vacuum_score": 0.1
    },
    "bid_depth_total": 2640.0,
    "ask_depth_total": 2376.0,
    "depth_imbalance": 0.052632,
    "status": "COMPOSITE_BOOK_OK",
    "notes": [
      "Illustrative synthetic sample; not live market data.",
      "Synthetic 1h public-depth fixture for dashboard multi-timeframe onboarding."
    ]
  }
}