{
  "schemaVersion": 1,
  "studyId": "2026-07-09-19-brokers-standard-accounts",
  "checkedAt": "2026-07-10",
  "status": "verified",
  "window": {
    "startUtc": "2026-07-09 10:00:30",
    "endUtc": "2026-07-09 19:00:30",
    "startThai": "2026-07-09 17:00:30",
    "endThai": "2026-07-10 02:00:30",
    "inclusiveMinuteCount": 541
  },
  "scope": {
    "audience": "global",
    "accountCategory": "standard-equivalent",
    "primarySymbols": [
      "EURUSD",
      "USDJPY",
      "GBPUSD",
      "AUDUSD",
      "USDCAD",
      "USDCHF",
      "NZDUSD"
    ],
    "primaryMetric": "equal-weight average of per-pair one-minute mean spreads",
    "unit": "pips",
    "samplingIntervalSeconds": 60,
    "primaryObservations": 67659
  },
  "publicObservationGrain": "one row per broker_slug + timestamp_utc + symbol",
  "publicObservationColumns": [
    "timestamp_utc",
    "broker_slug",
    "symbol",
    "bid",
    "ask",
    "spread_pips"
  ],
  "methodology": {
    "retainedStatus": "ok",
    "missingData": "No imputation; the 19-broker publication uses the original synchronized timestamp intersection retained during collection.",
    "median": "Standard midpoint median for even-sized samples.",
    "percentiles": "Nearest-rank P25, P75, and P95.",
    "ranking": "Brokers are ordered by the full-precision equal-weight average of the seven primary pair means. Rank distinctions use three-decimal comparison values, while the article displays spread values to two decimal places and explains apparent 7-pair avg. ties with the corresponding three-decimal values.",
    "extremes": "Minimum and maximum values are the lowest and highest spreads observed during this test, not broker guarantees."
  },
  "dataQuality": {
    "sourceBrokers": 19,
    "sourceFiles": 38,
    "sourceHashesUnchanged": true,
    "duplicateRowsRemoved": 352,
    "exclusionRecords": 761,
    "retainedPrimaryRows": 67659
  },
  "sourceIntegrity": {
    "cleaningSummarySha256": "a940f86d0a3e27580e957f36c52c2b0b3974fb65f095f8ff489db94eb52d3aea",
    "cleanedFiles": [
      {
        "brokerSlug": "avatrade",
        "sha256": "3b238db9c78bba2bedc0ff18aa94a2b684f329efd34583713a394f08bdb9fb68"
      },
      {
        "brokerSlug": "eightcap",
        "sha256": "cd207db81bef4a60d5e2079c56d2d0b26f298d66bdb23384038fc6137b1bf40d"
      },
      {
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      },
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      },
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      },
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      },
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    ]
  },
  "excludedPublicFields": [
    "account number",
    "account company",
    "account server",
    "login",
    "local path",
    "private name",
    "logger metadata",
    "internal message"
  ]
}