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  "method": "isotonic",
  "brier_raw": 0.19825470393871938,
  "brier_cal": 0.18872294228809272,
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  "test_base_rate": 0.7297476759628154,
  "loso": [
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      "base": 0.7324227355699628
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      "symbol": "USDJPY",
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      "base": 0.7028252001812962
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    {
      "symbol": "USDCHF",
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      "auc": 0.699568173561329,
      "base": 0.7603328331741918
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    {
      "symbol": "GBPUSD",
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      "auc": 0.6957124361813346,
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}