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      "difference": -1.0
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    {
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      "decision_session": "2018-11-19",
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      "difference": 17.75
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    {
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      "difference": -1.375
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      "difference": -3.2250000000000014
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      "difference": 5.924999999999997
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      "decision_session": "2021-03-17",
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      "difference": 1.9749999999999943
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    {
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      "decision_session": "2021-06-21",
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      "decision_session": "2021-07-20",
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      "difference": -11.025000000000006
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      "difference": -8.399999999999991
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      "decision_session": "2023-01-18",
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      "difference": 8.900000000000006
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      "decision_session": "2023-03-20",
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      "difference": 0.14999999999999147
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      "decision_session": "2023-06-20",
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      "difference": -2.7749999999999915
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      "decision_session": "2023-07-19",
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      "difference": -16.17500000000001
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      "decision_session": "2023-09-18",
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      "difference": -8.75
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    {
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      "decision_session": "2023-11-21",
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      "difference": 4.049999999999997
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    {
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      "decision_session": "2024-01-19",
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      "difference": 7.424999999999997
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    {
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      "decision_session": "2024-03-18",
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      "difference": 16.200000000000003
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    {
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      "decision_session": "2024-05-22",
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    {
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      "decision_session": "2024-06-20",
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      "difference": -1.8999999999999915
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      "difference": -17.125
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      "decision_session": "2024-09-18",
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    {
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    {
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      "decision_session": "2025-01-17",
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    {
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      "decision_session": "2025-03-20",
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      "difference": 10.724999999999994
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    {
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      "decision_session": "2025-05-21",
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      "difference": 3.125
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    {
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      "decision_session": "2025-06-16",
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    {
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      "decision_session": "2025-07-21",
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      "difference": -16.375
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    {
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      "decision_session": "2025-09-17",
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      "difference": -9.649999999999991
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    {
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      "decision_session": "2025-11-18",
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    {
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      "decision_session": "2026-01-16",
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      "difference": 6.875
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    {
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      "decision_session": "2026-03-18",
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    {
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      "decision_session": "2026-05-18",
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      "difference": 4.200000000000003
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    {
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      "to_contract": "HEQ26-CME",
      "decision_session": "2026-06-15",
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      "difference": -0.8250000000000028
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    {
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      "decision_session": "2026-07-17",
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      "switch_utc": "2026-07-19T22:00:00+00:00",
      "difference": -13.775000000000006
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    {
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      "to_contract": "HEZ26-CME",
      "decision_session": "2026-09-17",
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      "switch_utc": "2026-09-17T22:00:00+00:00",
      "difference": -9.275000000000006
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  ]
}