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  "venue_policy_id": "marketworld_multi_dataset_official_only_v1",
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  "anti_lookahead_policy": "Each step exposes a single common timestamp across all selected instruments; strategy still sees previous closed step and fills on the next step.",
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      "dataset_source": "kraken_spot_public_ohlc",
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    "end": "2026-06-26",
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