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      "from_contract": "BTCM22-CME",
      "to_contract": "BTCN22-CME",
      "decision_session": "2022-06-24",
      "old_volume": 1036,
      "new_volume": 6500,
      "switch_utc": "2022-06-26T22:00:00+00:00",
      "difference": -110.0
    },
    {
      "from_contract": "BTCN22-CME",
      "to_contract": "BTCQ22-CME",
      "decision_session": "2022-07-29",
      "old_volume": 501,
      "new_volume": 7166,
      "switch_utc": "2022-07-31T22:00:00+00:00",
      "difference": 85.0
    },
    {
      "from_contract": "BTCQ22-CME",
      "to_contract": "BTCU22-CME",
      "decision_session": "2022-08-25",
      "old_volume": 3855,
      "new_volume": 5756,
      "switch_utc": "2022-08-25T22:00:00+00:00",
      "difference": -95.0
    },
    {
      "from_contract": "BTCU22-CME",
      "to_contract": "BTCV22-CME",
      "decision_session": "2022-09-30",
      "old_volume": 296,
      "new_volume": 11917,
      "switch_utc": "2022-10-02T22:00:00+00:00",
      "difference": 295.0
    },
    {
      "from_contract": "BTCV22-CME",
      "to_contract": "BTCX22-CME",
      "decision_session": "2022-10-28",
      "old_volume": 478,
      "new_volume": 8122,
      "switch_utc": "2022-10-30T22:00:00+00:00",
      "difference": 100.0
    },
    {
      "from_contract": "BTCX22-CME",
      "to_contract": "BTCZ22-CME",
      "decision_session": "2022-11-25",
      "old_volume": 251,
      "new_volume": 2386,
      "switch_utc": "2022-11-27T23:00:00+00:00",
      "difference": -245.0
    },
    {
      "from_contract": "BTCZ22-CME",
      "to_contract": "BTCF23-CME",
      "decision_session": "2022-12-30",
      "old_volume": 283,
      "new_volume": 5763,
      "switch_utc": "2023-01-01T23:00:00+00:00",
      "difference": -15.0
    },
    {
      "from_contract": "BTCF23-CME",
      "to_contract": "BTCG23-CME",
      "decision_session": "2023-01-27",
      "old_volume": 909,
      "new_volume": 6988,
      "switch_utc": "2023-01-29T23:00:00+00:00",
      "difference": 85.0
    },
    {
      "from_contract": "BTCG23-CME",
      "to_contract": "BTCH23-CME",
      "decision_session": "2023-02-24",
      "old_volume": 785,
      "new_volume": 11458,
      "switch_utc": "2023-02-26T23:00:00+00:00",
      "difference": -60.0
    },
    {
      "from_contract": "BTCH23-CME",
      "to_contract": "BTCJ23-CME",
      "decision_session": "2023-03-31",
      "old_volume": 636,
      "new_volume": 5906,
      "switch_utc": "2023-04-02T22:00:00+00:00",
      "difference": 365.0
    },
    {
      "from_contract": "BTCJ23-CME",
      "to_contract": "BTCK23-CME",
      "decision_session": "2023-04-28",
      "old_volume": 597,
      "new_volume": 5609,
      "switch_utc": "2023-04-30T22:00:00+00:00",
      "difference": 60.0
    },
    {
      "from_contract": "BTCK23-CME",
      "to_contract": "BTCM23-CME",
      "decision_session": "2023-05-26",
      "old_volume": 448,
      "new_volume": 5197,
      "switch_utc": "2023-05-28T22:00:00+00:00",
      "difference": 180.0
    },
    {
      "from_contract": "BTCM23-CME",
      "to_contract": "BTCN23-CME",
      "decision_session": "2023-06-30",
      "old_volume": 714,
      "new_volume": 18858,
      "switch_utc": "2023-07-02T22:00:00+00:00",
      "difference": 335.0
    },
    {
      "from_contract": "BTCN23-CME",
      "to_contract": "BTCQ23-CME",
      "decision_session": "2023-07-28",
      "old_volume": 481,
      "new_volume": 6201,
      "switch_utc": "2023-07-30T22:00:00+00:00",
      "difference": 335.0
    },
    {
      "from_contract": "BTCQ23-CME",
      "to_contract": "BTCU23-CME",
      "decision_session": "2023-08-25",
      "old_volume": 429,
      "new_volume": 5268,
      "switch_utc": "2023-08-27T22:00:00+00:00",
      "difference": -75.0
    },
    {
      "from_contract": "BTCU23-CME",
      "to_contract": "BTCV23-CME",
      "decision_session": "2023-09-28",
      "old_volume": 5919,
      "new_volume": 9716,
      "switch_utc": "2023-09-28T22:00:00+00:00",
      "difference": 230.0
    },
    {
      "from_contract": "BTCV23-CME",
      "to_contract": "BTCX23-CME",
      "decision_session": "2023-10-27",
      "old_volume": 641,
      "new_volume": 6629,
      "switch_utc": "2023-10-29T22:00:00+00:00",
      "difference": 300.0
    },
    {
      "from_contract": "BTCX23-CME",
      "to_contract": "BTCZ23-CME",
      "decision_session": "2023-11-23",
      "old_volume": 1268,
      "new_volume": 1612,
      "switch_utc": "2023-11-23T23:00:00+00:00",
      "difference": 660.0
    },
    {
      "from_contract": "BTCZ23-CME",
      "to_contract": "BTCF24-CME",
      "decision_session": "2023-12-28",
      "old_volume": 3476,
      "new_volume": 4150,
      "switch_utc": "2023-12-28T23:00:00+00:00",
      "difference": 585.0
    },
    {
      "from_contract": "BTCF24-CME",
      "to_contract": "BTCG24-CME",
      "decision_session": "2024-01-25",
      "old_volume": 3210,
      "new_volume": 3421,
      "switch_utc": "2024-01-25T23:00:00+00:00",
      "difference": 290.0
    },
    {
      "from_contract": "BTCG24-CME",
      "to_contract": "BTCH24-CME",
      "decision_session": "2024-02-22",
      "old_volume": 3956,
      "new_volume": 4344,
      "switch_utc": "2024-02-22T23:00:00+00:00",
      "difference": 695.0
    },
    {
      "from_contract": "BTCH24-CME",
      "to_contract": "BTCJ24-CME",
      "decision_session": "2024-03-28",
      "old_volume": 1056,
      "new_volume": 6461,
      "switch_utc": "2024-03-28T22:00:00+00:00",
      "difference": 935.0
    },
    {
      "from_contract": "BTCJ24-CME",
      "to_contract": "BTCK24-CME",
      "decision_session": "2024-04-26",
      "old_volume": 485,
      "new_volume": 4853,
      "switch_utc": "2024-04-28T22:00:00+00:00",
      "difference": 10.0
    },
    {
      "from_contract": "BTCK24-CME",
      "to_contract": "BTCM24-CME",
      "decision_session": "2024-05-31",
      "old_volume": 577,
      "new_volume": 6513,
      "switch_utc": "2024-06-02T22:00:00+00:00",
      "difference": 245.0
    },
    {
      "from_contract": "BTCM24-CME",
      "to_contract": "BTCN24-CME",
      "decision_session": "2024-06-28",
      "old_volume": 584,
      "new_volume": 6039,
      "switch_utc": "2024-06-30T22:00:00+00:00",
      "difference": 225.0
    },
    {
      "from_contract": "BTCN24-CME",
      "to_contract": "BTCQ24-CME",
      "decision_session": "2024-07-26",
      "old_volume": 549,
      "new_volume": 6969,
      "switch_utc": "2024-07-28T22:00:00+00:00",
      "difference": 660.0
    },
    {
      "from_contract": "BTCQ24-CME",
      "to_contract": "BTCU24-CME",
      "decision_session": "2024-08-30",
      "old_volume": 452,
      "new_volume": 7112,
      "switch_utc": "2024-09-01T22:00:00+00:00",
      "difference": -335.0
    },
    {
      "from_contract": "BTCU24-CME",
      "to_contract": "BTCV24-CME",
      "decision_session": "2024-09-26",
      "old_volume": 6684,
      "new_volume": 6850,
      "switch_utc": "2024-09-26T22:00:00+00:00",
      "difference": 525.0
    },
    {
      "from_contract": "BTCV24-CME",
      "to_contract": "BTCX24-CME",
      "decision_session": "2024-10-24",
      "old_volume": 3121,
      "new_volume": 3761,
      "switch_utc": "2024-10-24T22:00:00+00:00",
      "difference": 565.0
    },
    {
      "from_contract": "BTCX24-CME",
      "to_contract": "BTCZ24-CME",
      "decision_session": "2024-11-27",
      "old_volume": 5921,
      "new_volume": 6072,
      "switch_utc": "2024-11-27T23:00:00+00:00",
      "difference": 1160.0
    },
    {
      "from_contract": "BTCZ24-CME",
      "to_contract": "BTCF25-CME",
      "decision_session": "2024-12-26",
      "old_volume": 4611,
      "new_volume": 5857,
      "switch_utc": "2024-12-26T23:00:00+00:00",
      "difference": 970.0
    },
    {
      "from_contract": "BTCF25-CME",
      "to_contract": "BTCG25-CME",
      "decision_session": "2025-01-30",
      "old_volume": 4694,
      "new_volume": 6294,
      "switch_utc": "2025-01-30T23:00:00+00:00",
      "difference": 780.0
    },
    {
      "from_contract": "BTCG25-CME",
      "to_contract": "BTCH25-CME",
      "decision_session": "2025-02-27",
      "old_volume": 4542,
      "new_volume": 5089,
      "switch_utc": "2025-02-27T23:00:00+00:00",
      "difference": 455.0
    },
    {
      "from_contract": "BTCH25-CME",
      "to_contract": "BTCJ25-CME",
      "decision_session": "2025-03-28",
      "old_volume": 729,
      "new_volume": 9001,
      "switch_utc": "2025-03-30T22:00:00+00:00",
      "difference": 60.0
    },
    {
      "from_contract": "BTCJ25-CME",
      "to_contract": "BTCK25-CME",
      "decision_session": "2025-04-25",
      "old_volume": 708,
      "new_volume": 6790,
      "switch_utc": "2025-04-27T22:00:00+00:00",
      "difference": 1550.0
    },
    {
      "from_contract": "BTCK25-CME",
      "to_contract": "BTCM25-CME",
      "decision_session": "2025-05-29",
      "old_volume": 4992,
      "new_volume": 5198,
      "switch_utc": "2025-05-29T22:00:00+00:00",
      "difference": 580.0
    },
    {
      "from_contract": "BTCM25-CME",
      "to_contract": "BTCN25-CME",
      "decision_session": "2025-06-26",
      "old_volume": 2495,
      "new_volume": 2561,
      "switch_utc": "2025-06-26T22:00:00+00:00",
      "difference": 660.0
    },
    {
      "from_contract": "BTCN25-CME",
      "to_contract": "BTCQ25-CME",
      "decision_session": "2025-07-25",
      "old_volume": 839,
      "new_volume": 9540,
      "switch_utc": "2025-07-27T22:00:00+00:00",
      "difference": 660.0
    },
    {
      "from_contract": "BTCQ25-CME",
      "to_contract": "BTCU25-CME",
      "decision_session": "2025-08-29",
      "old_volume": 507,
      "new_volume": 6958,
      "switch_utc": "2025-08-31T22:00:00+00:00",
      "difference": 25.0
    },
    {
      "from_contract": "BTCU25-CME",
      "to_contract": "BTCV25-CME",
      "decision_session": "2025-09-26",
      "old_volume": 567,
      "new_volume": 5531,
      "switch_utc": "2025-09-28T22:00:00+00:00",
      "difference": 125.0
    },
    {
      "from_contract": "BTCV25-CME",
      "to_contract": "BTCX25-CME",
      "decision_session": "2025-10-31",
      "old_volume": 541,
      "new_volume": 6329,
      "switch_utc": "2025-11-02T23:00:00+00:00",
      "difference": 290.0
    },
    {
      "from_contract": "BTCX25-CME",
      "to_contract": "BTCZ25-CME",
      "decision_session": "2025-11-27",
      "old_volume": 945,
      "new_volume": 1515,
      "switch_utc": "2025-11-27T23:00:00+00:00",
      "difference": 375.0
    },
    {
      "from_contract": "BTCZ25-CME",
      "to_contract": "BTCF26-CME",
      "decision_session": "2025-12-26",
      "old_volume": 633,
      "new_volume": 6189,
      "switch_utc": "2025-12-28T23:00:00+00:00",
      "difference": 500.0
    },
    {
      "from_contract": "BTCF26-CME",
      "to_contract": "BTCG26-CME",
      "decision_session": "2026-01-29",
      "old_volume": 4413,
      "new_volume": 7220,
      "switch_utc": "2026-01-29T23:00:00+00:00",
      "difference": 295.0
    },
    {
      "from_contract": "BTCG26-CME",
      "to_contract": "BTCH26-CME",
      "decision_session": "2026-02-26",
      "old_volume": 5746,
      "new_volume": 5788,
      "switch_utc": "2026-02-26T23:00:00+00:00",
      "difference": 255.0
    },
    {
      "from_contract": "BTCH26-CME",
      "to_contract": "BTCJ26-CME",
      "decision_session": "2026-03-26",
      "old_volume": 4238,
      "new_volume": 5099,
      "switch_utc": "2026-03-26T22:00:00+00:00",
      "difference": 325.0
    },
    {
      "from_contract": "BTCJ26-CME",
      "to_contract": "BTCK26-CME",
      "decision_session": "2026-04-24",
      "old_volume": 797,
      "new_volume": 6850,
      "switch_utc": "2026-04-26T22:00:00+00:00",
      "difference": 500.0
    },
    {
      "from_contract": "BTCK26-CME",
      "to_contract": "BTCM26-CME",
      "decision_session": "2026-05-28",
      "old_volume": 5283,
      "new_volume": 5437,
      "switch_utc": "2026-05-28T22:00:00+00:00",
      "difference": 265.0
    },
    {
      "from_contract": "BTCM26-CME",
      "to_contract": "BTCN26-CME",
      "decision_session": "2026-06-26",
      "old_volume": 891,
      "new_volume": 8856,
      "switch_utc": "2026-06-28T22:00:00+00:00",
      "difference": 80.0
    },
    {
      "from_contract": "BTCN26-CME",
      "to_contract": "BTCQ26-CME",
      "decision_session": "2026-07-30",
      "old_volume": 3661,
      "new_volume": 4191,
      "switch_utc": "2026-07-30T22:00:00+00:00",
      "difference": 295.0
    },
    {
      "from_contract": "BTCQ26-CME",
      "to_contract": "BTCU26-CME",
      "decision_session": "2026-08-27",
      "old_volume": 5561,
      "new_volume": 6572,
      "switch_utc": "2026-08-27T22:00:00+00:00",
      "difference": 540.0
    },
    {
      "from_contract": "BTCU26-CME",
      "to_contract": "BTCV26-CME",
      "decision_session": "2026-09-25",
      "old_volume": 442,
      "new_volume": 8224,
      "switch_utc": "2026-09-27T22:00:00+00:00",
      "difference": 680.0
    }
  ]
}