{
  "symbol": "AUS200",
  "display": "AUS200",
  "asset_class": "indices",
  "timeframe": "M1",
  "rows": 100000,
  "start": "2026.06.25 13:29:00",
  "end": "2026.10.09 19:59:00",
  "score": 85.4,
  "grade": "B",
  "critical_count": 0,
  "warning_count": 2,
  "checks": {
    "duplicates": 0,
    "out_of_order": 0,
    "ohlc_violations": 0,
    "nonpositive_prices": 0,
    "flat_bars": 4958,
    "flat_bars_pct": 4.958,
    "zero_volume": 0,
    "zero_volume_pct": 0.0,
    "zero_spread": 0,
    "zero_spread_pct": 0.0,
    "negative_spread": 0,
    "extreme_returns": 0,
    "gaps": 774,
    "largest_gap_seconds": 5640,
    "largest_gap_start": "2026.07.03 17:13:00",
    "weekend_bars": 1615
  },
  "issues": [
    {
      "severity": "warning",
      "check": "gaps",
      "count": 774,
      "message": "Gap greater than 2x timeframe and under 24h"
    },
    {
      "severity": "info",
      "check": "flat_bars",
      "count": 4958,
      "message": "Open=High=Low=Close"
    },
    {
      "severity": "warning",
      "check": "weekend_bars",
      "count": 1615,
      "message": "Invalid weekend bars for this asset class"
    }
  ],
  "generated_at": "2026-11-01",
  "report_url": "/historical-data/data-quality/detail.php?symbol=AUS200&tf=M1"
}