{
  "scope": "XAUUSD M15 2017-2026 full-feed (runtime-semantics equal-allowed pivots)",
  "n_bars": 197032,
  "choch_state": {
    "onsets": 2197,
    "active_bars": 196817,
    "repetition_ratio": 89.584,
    "zero_after_first_event": false,
    "run_median": 318.0,
    "run_max": 2187,
    "run_n": 493,
    "age_active_median": 49.0,
    "age_active_p99": 242.0,
    "age_active_max": 418,
    "note": "state f8 = last CHoCH direction (persisten, per FEATURE_CONTRACT); bukan duplicate emission detector."
  },
  "f9_chochOK": {
    "true_bars": 51105,
    "fresh_bars_le40": 33391,
    "stale_bars_gt40": 17714,
    "stale_fraction": 0.3466,
    "note": "f9 memakai CHoCH tanpa expiry -> event basi tetap 'confirm'"
  },
  "f18_leg_choch_swp": {
    "true_bars": 97826,
    "stale_bars_gt40": 56761,
    "stale_fraction": 0.5802,
    "note": "f18 +15 (chochDir==swpDir) tanpa expiry"
  },
  "seq_window": 40
}