diff --git a/apps/intraday_bt/scripts/diag_orb_trending_features.py b/apps/intraday_bt/scripts/diag_orb_trending_features.py
new file mode 100644
index 0000000..683181e
--- /dev/null
+++ b/apps/intraday_bt/scripts/diag_orb_trending_features.py
@@ -0,0 +1,499 @@
+"""
+V30 ORB Trending / Mean-Reversion Features Diagnostic
+
+Tests three features measuring trend persistence and idiosyncratic gap strength:
+
+  hurst_60d       : Hurst exponent via R/S analysis on 60d daily returns.
+                    H > 0.5 = trending (persistent), H < 0.5 = mean-reverting.
+                    High H before gap-up ORB → stock in trend → better follow-through?
+                    Port of pre_event_hurst (market_features.py) to dict bars.
+
+  ou_theta_60d    : OU mean-reversion speed θ = -ln(β) from AR(1) on log prices.
+                    Low θ (near 0) = slow reversion = PEAD / breakout friendly.
+                    Port of pre_event_ou_theta (market_features.py) to dict bars.
+
+  gap_vs_market   : stock gap_pct − QQQ gap_pct on the same trade day.
+                    Measures idiosyncratic (stock-specific) strength above macro open.
+                    High = gap driven by stock news/catalyst, not market tide.
+
+Context: V25 short-vol FAILED. V26 tape-ignition FAILED. V27 RSI/BB FAILED (redundant OBV).
+         V28 volatility-compression FAILED (gap_zscore G2 near-miss). V29 structural FAILED.
+         Note: Hurst+OU previously tested on V23 200d n=96 — near-zero correlation.
+               Retesting on V24 400d n=180 for definitive answer.
+
+Gates:
+  G1: |Pearson| ≥ 0.07 on ≥ 120 trades (relaxed to 60 if coverage < 80%)
+  G2: |top − bottom tercile avg_R| ≥ 0.30R
+  G3: |top − bottom tercile WR| ≥ 5pp
+  G4: feature coverage ≥ 50%
+  G5a: |ρ(feature, obv_slope_20)| < 0.70
+  G5b: |ρ(feature, avg_daily_vol_14d)| < 0.70
+"""
+from __future__ import annotations
+
+import concurrent.futures
+import datetime as dt
+import math
+import os
+import sys
+from pathlib import Path
+
+import pyarrow.parquet as pq
+import yaml
+from zoneinfo import ZoneInfo
+
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "../../..")))
+
+from libs.common.time_utils import trading_days_between
+from libs.intraday.domain import ORBStrategyParams
+from libs.intraday.features import compute_obv_slope_approx, enrich_daily_bars
+from libs.intraday.orb_simulator import ORBSimulationState, run_orb_simulation_with_state
+from libs.intraday.screener import orb_pre_screen_candidates
+
+# ── Config ──────────────────────────────────────────────────────────────────
+V24_CONFIG = "configs/intraday/strategies/orb_gainers_v24_quality_overlay.yaml"
+UNIVERSE_FILE = "configs/symbols_midlarge_snapshot_exact.yaml"
+INTRADAY_CACHE_DIR = "data/cache/intraday"
+LOOKBACK_DAYS = 400
+FEATURE_LOOKBACK_TRADING = 30
+
+_ET = ZoneInfo("America/New_York")
+_MKT_OPEN = dt.time(9, 30)
+_MKT_CLOSE = dt.time(16, 0)
+
+
+# ── Feature Computers ────────────────────────────────────────────────────────
+
+def compute_hurst_60d(prev_bars: list[dict]) -> float | None:
+    """Hurst exponent via R/S analysis on 60d prior returns."""
+    if len(prev_bars) < 62:
+        return None
+    sb = sorted(prev_bars, key=lambda b: b["date"])[-62:]
+    rets = []
+    for i in range(1, len(sb)):
+        pc, cc = sb[i-1]["close"], sb[i]["close"]
+        if pc > 0:
+            rets.append((cc - pc) / pc)
+    if len(rets) < 30:
+        return None
+
+    def rs_stat(series: list[float]) -> float:
+        n = len(series)
+        mean = sum(series) / n
+        devs = [x - mean for x in series]
+        cumdev, s = [], 0.0
+        for d in devs:
+            s += d
+            cumdev.append(s)
+        r = max(cumdev) - min(cumdev)
+        std = (sum(d**2 for d in devs) / n) ** 0.5
+        return (r / std) if std > 0 else 0.0
+
+    window_sizes = [w for w in [8, 12, 16, 24, 32] if w <= len(rets) // 2]
+    if len(window_sizes) < 2:
+        return None
+
+    log_n, log_rs = [], []
+    for w in window_sizes:
+        rs_vals = []
+        for start in range(0, len(rets) - w + 1, w):
+            chunk = rets[start:start + w]
+            if len(chunk) == w:
+                rs_vals.append(rs_stat(chunk))
+        if rs_vals:
+            avg_rs = sum(rs_vals) / len(rs_vals)
+            if avg_rs > 0:
+                log_n.append(math.log(w))
+                log_rs.append(math.log(avg_rs))
+
+    if len(log_n) < 2:
+        return None
+    n = len(log_n)
+    xm = sum(log_n) / n
+    ym = sum(log_rs) / n
+    num = sum((log_n[i]-xm)*(log_rs[i]-ym) for i in range(n))
+    den = sum((log_n[i]-xm)**2 for i in range(n))
+    return (num / den) if den > 0 else 0.5
+
+
+def compute_ou_theta_60d(prev_bars: list[dict]) -> float | None:
+    """OU mean-reversion speed θ = -ln(β) from AR(1) on log prices (60d)."""
+    if len(prev_bars) < 61:
+        return None
+    sb = sorted(prev_bars, key=lambda b: b["date"])[-61:]
+    log_prices = []
+    for b in sb:
+        if b["close"] <= 0:
+            return None
+        log_prices.append(math.log(b["close"]))
+    if len(log_prices) < 61:
+        return None
+    y = log_prices[1:]
+    x = log_prices[:-1]
+    n = len(y)
+    xm = sum(x) / n
+    ym = sum(y) / n
+    num = sum((x[i]-xm)*(y[i]-ym) for i in range(n))
+    den = sum((x[i]-xm)**2 for i in range(n))
+    if den <= 0:
+        return None
+    beta = num / den
+    if beta <= 0 or beta >= 1.0:
+        return 0.0
+    return -math.log(beta)
+
+
+# ── Daily Bar Builder ─────────────────────────────────────────────────────────
+
+def _parse_ts(ts_raw: object) -> dt.datetime:
+    s = str(ts_raw)
+    if s.endswith("Z"):
+        s = s[:-1] + "+00:00"
+    return dt.datetime.fromisoformat(s).astimezone(_ET)
+
+
+def _build_daily_bar(path: Path, date: str) -> dict | None:
+    try:
+        table = pq.read_table(str(path))
+        rows = table.to_pydict()
+    except Exception:
+        return None
+    opens, highs, lows, closes, vols = [], [], [], [], []
+    for i, ts_raw in enumerate(rows.get("timestamp", [])):
+        try:
+            ts = _parse_ts(ts_raw)
+        except Exception:
+            continue
+        if _MKT_OPEN <= ts.time() < _MKT_CLOSE:
+            opens.append(float(rows["open"][i] or 0))
+            highs.append(float(rows["high"][i] or 0))
+            lows.append(float(rows["low"][i] or 0))
+            closes.append(float(rows["close"][i] or 0))
+            vols.append(float(rows["volume"][i] or 0))
+    if not opens:
+        return None
+    return {
+        "date": date, "open": opens[0], "high": max(highs),
+        "low": min(lows), "close": closes[-1], "volume": sum(vols),
+    }
+
+
+def build_daily_bars(tickers: list[str], dates: list[str], workers: int = 8) -> dict[str, list[dict]]:
+    root = Path(INTRADAY_CACHE_DIR)
+
+    def _load(ticker: str) -> tuple[str, list[dict]]:
+        d_path = root / ticker
+        if not d_path.is_dir():
+            return ticker, []
+        bars: list[dict] = []
+        for date in dates:
+            p = d_path / f"{date}.parquet"
+            if not p.exists():
+                continue
+            bar = _build_daily_bar(p, date)
+            if bar and bar["close"] > 0:
+                bars.append(bar)
+        return ticker, bars
+
+    result: dict[str, list[dict]] = {}
+    with concurrent.futures.ThreadPoolExecutor(max_workers=workers) as ex:
+        for ticker, bars in ex.map(_load, tickers):
+            if bars:
+                result[ticker] = bars
+    return result
+
+
+def load_intraday_bulk(candidates: dict[str, list[str]]) -> dict[str, dict[str, list[dict]]]:
+    import pandas as pd
+    result: dict[str, dict[str, list[dict]]] = {}
+    for date, tickers in candidates.items():
+        day_bars: dict[str, list[dict]] = {}
+        for ticker in tickers:
+            p = Path(INTRADAY_CACHE_DIR) / ticker / f"{date}.parquet"
+            if not p.exists():
+                continue
+            try:
+                df = pd.read_parquet(str(p))
+                if not df.empty and len(df) >= 5:
+                    day_bars[ticker] = df.to_dict("records")
+            except Exception:
+                pass
+        if day_bars:
+            result[date] = day_bars
+    return result
+
+
+# ── Stats Helpers ─────────────────────────────────────────────────────────────
+
+def pearson(xs: list[float], ys: list[float]) -> float | None:
+    if len(xs) != len(ys) or len(xs) < 2:
+        return None
+    n = len(xs)
+    xm, ym = sum(xs) / n, sum(ys) / n
+    num = sum((xs[i]-xm)*(ys[i]-ym) for i in range(n))
+    dx = (sum((x-xm)**2 for x in xs)) ** 0.5
+    dy = (sum((y-ym)**2 for y in ys)) ** 0.5
+    if dx <= 0 or dy <= 0:
+        return None
+    return num / (dx * dy)
+
+
+def tercile_stats(vals: list[float], outcomes_r: list[float]) -> dict:
+    if len(vals) < 6:
+        return {}
+    pairs = sorted(zip(vals, outcomes_r), key=lambda p: p[0])
+    n = len(pairs)
+    t = n // 3
+
+    def stats(sub):
+        ys = [p[1] for p in sub]
+        wr = sum(1 for y in ys if y > 0) / len(ys) if ys else 0.0
+        return {"n": len(ys), "wr": wr, "avg_r": sum(ys)/len(ys) if ys else 0.0}
+
+    return {"low": stats(pairs[:t]), "mid": stats(pairs[t:2*t]), "high": stats(pairs[2*t:])}
+
+
+# ── Main ─────────────────────────────────────────────────────────────────────
+
+def main() -> None:
+    print("=== V30 ORB Trending / Mean-Reversion Features Diagnostic ===\n")
+
+    with open(V24_CONFIG) as f:
+        raw = yaml.safe_load(f)
+    params = ORBStrategyParams(**raw["orb_strategy"])
+    print(f"V24 config loaded. weight_obv_slope={params.weight_obv_slope}")
+
+    today = dt.date(2026, 4, 21)
+    all_td = trading_days_between(today - dt.timedelta(days=700), today)
+    trading_days_list = [d.isoformat() for d in all_td[-LOOKBACK_DAYS:]]
+    print(f"Window: {trading_days_list[0]} → {trading_days_list[-1]} ({len(trading_days_list)} trading days)")
+
+    extended_td = [d.isoformat() for d in all_td[-(LOOKBACK_DAYS + FEATURE_LOOKBACK_TRADING + 10):]]
+    first_cal = dt.date.fromisoformat(extended_td[0])
+    last_cal = dt.date.fromisoformat(trading_days_list[-1])
+    needed_dates: list[str] = []
+    d = first_cal
+    while d <= last_cal:
+        needed_dates.append(d.isoformat())
+        d += dt.timedelta(days=1)
+
+    with open(UNIVERSE_FILE) as f:
+        udata = yaml.safe_load(f)
+    universe = udata.get("symbols", udata) if isinstance(udata, dict) else udata
+    if "QQQ" not in universe:
+        universe = list(universe) + ["QQQ"]
+    print(f"Universe: {len(universe)} tickers")
+
+    print(f"\nBuilding daily bars ({len(needed_dates)} calendar days)...")
+    daily_bars = build_daily_bars(universe, needed_dates)
+    print(f"Built daily bars for {len(daily_bars)} tickers")
+    print("Computing enrichment...")
+    enrichment = enrich_daily_bars(daily_bars, trading_days_list)
+    print(f"Enrichment for {len(enrichment)} tickers")
+
+    candidates = orb_pre_screen_candidates(
+        daily_bars, trading_days_list, enrichment,
+        min_price=params.min_price, min_atr=params.min_atr_14,
+        min_avg_dollar_vol=params.min_avg_dollar_volume, max_per_day=None,
+    )
+    print(f"Pre-screened: {sum(len(v) for v in candidates.values())} ticker-days")
+    print("Loading intraday bars...")
+    all_intraday = load_intraday_bulk(candidates)
+    print(f"Loaded: {sum(len(v) for v in all_intraday.values())} ticker-days")
+
+    print("\nRunning V24 simulation...")
+    state = ORBSimulationState(equity=params.initial_capital)
+    day_results, _ = run_orb_simulation_with_state(
+        all_intraday, trading_days_list, params, enrichment, state=state,
+    )
+    all_trades = [t for dr in day_results for t in dr.trades]
+    trades_with_r = [t for t in all_trades if getattr(t, "r_multiple_at_exit", None) is not None]
+    print(f"Total trades: {len(all_trades)}, with r_multiple: {len(trades_with_r)}")
+
+    if len(trades_with_r) < 20:
+        print("ABORT: fewer than 20 trades with r_multiple")
+        return
+
+    print("\nComputing trending/mean-reversion features per trade...")
+    sorted_daily: dict[str, list[dict]] = {
+        t: sorted(bars, key=lambda b: b["date"]) for t, bars in daily_bars.items()
+    }
+
+    # Pre-build QQQ gap_pct lookup per trade day from enrichment
+    qqq_enrich = enrichment.get("QQQ", {})
+
+    annotated: list[dict] = []
+    missing: dict[str, int] = {
+        "hurst_60d": 0, "ou_theta_60d": 0, "gap_vs_market": 0,
+        "obv_slope": 0, "avg_vol": 0,
+    }
+
+    for trade in trades_with_r:
+        ticker = trade.ticker
+        date = str(trade.date)[:10]
+        r = float(trade.r_multiple_at_exit)
+
+        bars_t = sorted_daily.get(ticker, [])
+        prev_bars = [b for b in bars_t if b["date"][:10] < date]
+
+        f_hurst = compute_hurst_60d(prev_bars)
+        f_ou = compute_ou_theta_60d(prev_bars)
+        f_obv = compute_obv_slope_approx(prev_bars, lookback=20)
+
+        # gap_vs_market: stock gap_pct - QQQ gap_pct on trade day
+        enrich_day = enrichment.get(ticker, {}).get(date, {})
+        stock_gap = enrich_day.get("gap_pct")
+        qqq_day_enrich = qqq_enrich.get(date, {})
+        qqq_gap = qqq_day_enrich.get("gap_pct")
+        f_gap_vs_mkt = (stock_gap - qqq_gap) if (stock_gap is not None and qqq_gap is not None) else None
+
+        avg_vol = enrich_day.get("avg_daily_vol_14d")
+
+        for fname, fval in [
+            ("hurst_60d", f_hurst), ("ou_theta_60d", f_ou),
+            ("gap_vs_market", f_gap_vs_mkt), ("obv_slope", f_obv), ("avg_vol", avg_vol),
+        ]:
+            if fval is None:
+                missing[fname] += 1
+
+        annotated.append({
+            "ticker": ticker, "date": date, "r": r,
+            "hurst_60d": f_hurst,
+            "ou_theta_60d": f_ou,
+            "gap_vs_market": f_gap_vs_mkt,
+            "obv_slope": f_obv,
+            "avg_daily_vol": avg_vol,
+        })
+
+    total = len(annotated)
+    print(f"Annotated: {total} trades")
+    for fname in ["hurst_60d", "ou_theta_60d", "gap_vs_market"]:
+        print(f"  Missing {fname}: {missing[fname]}/{total}")
+
+    feature_defs = [
+        ("hurst_60d", "R/S Hurst exponent on 60d returns — H>0.5 = trending", "high"),
+        ("ou_theta_60d", "OU θ = -ln(β) from AR(1) — low = slow reversion = breakout-friendly", "low"),
+        ("gap_vs_market", "stock gap_pct − QQQ gap_pct — high = idiosyncratic strength", "high"),
+    ]
+
+    print("\n" + "=" * 90)
+    print(f"FEATURE ANALYSIS — V24 {LOOKBACK_DAYS}d trade set")
+    print("=" * 90)
+
+    results: dict[str, dict | None] = {}
+    for feat_name, description, hypothesized_best in feature_defs:
+        valid = [(a[feat_name], a["r"]) for a in annotated if a[feat_name] is not None]
+        if len(valid) < 20:
+            print(f"\n{feat_name}: SKIP — only {len(valid)} valid trades (need ≥20)")
+            results[feat_name] = None
+            continue
+
+        vals = [v[0] for v in valid]
+        rs = [v[1] for v in valid]
+        overall_wr = sum(1 for v in valid if v[1] > 0) / len(valid)
+        rho = pearson(vals, rs)
+        tstat = tercile_stats(vals, rs)
+        coverage_pct = len(valid) / total
+        rho_abs = abs(rho) if rho is not None else 0.0
+
+        if tstat:
+            best_tercile = "high" if tstat["high"]["avg_r"] >= tstat["low"]["avg_r"] else "low"
+            worst_tercile = "low" if best_tercile == "high" else "high"
+            direction_match = best_tercile == hypothesized_best
+
+            print(f"\n{'─'*60}")
+            print(f"FEATURE: {feat_name}")
+            print(f"  Description: {description}")
+            print(f"  n={len(valid)}/{total} ({coverage_pct*100:.0f}% coverage), overall WR={overall_wr*100:.1f}%")
+            print(f"  Pearson(feature, r_multiple) = {rho:.4f}" if rho is not None else "  Pearson = n/a")
+            print("  Tercile breakdown (low→high feature value):")
+            h, m, lo = tstat["high"], tstat["mid"], tstat["low"]
+            print(f"    Bottom: n={lo['n']}, WR={lo['wr']*100:.1f}%, avg_R={lo['avg_r']:+.3f}")
+            print(f"    Middle: n={m['n']}, WR={m['wr']*100:.1f}%, avg_R={m['avg_r']:+.3f}")
+            print(f"    Top:    n={h['n']}, WR={h['wr']*100:.1f}%, avg_R={h['avg_r']:+.3f}")
+            print(f"  Empirical best: '{best_tercile}' tercile (hypothesis: '{hypothesized_best}' → {'✓ confirmed' if direction_match else '✗ INVERTED'})")
+
+            best = tstat[best_tercile]
+            worst = tstat[worst_tercile]
+            min_trades = 120 if coverage_pct >= 0.80 else 60
+            g1 = rho_abs >= 0.07 and len(valid) >= min_trades
+            g2 = best["avg_r"] - worst["avg_r"] >= 0.30
+            g3 = best["wr"] >= worst["wr"] + 0.05
+            g4 = coverage_pct >= 0.50
+            n_failed = sum([not g1, not g2, not g3, not g4])
+            overall_pass = n_failed == 0
+
+            print(f"  Gates (best='{best_tercile}' tercile):")
+            print(f"    G1 |Pearson|≥0.07 + n≥{min_trades}: {rho_abs:.4f}, n={len(valid)}  → {'PASS ✓' if g1 else 'FAIL ✗'}")
+            print(f"    G2 avg_R gap ≥ 0.30R: {best['avg_r'] - worst['avg_r']:+.3f}  → {'PASS ✓' if g2 else 'FAIL ✗'}")
+            print(f"    G3 WR gap ≥ 5pp: {(best['wr'] - worst['wr'])*100:+.1f}pp  → {'PASS ✓' if g3 else 'FAIL ✗'}")
+            print(f"    G4 coverage ≥ 50%: {coverage_pct*100:.0f}%  → {'PASS ✓' if g4 else 'FAIL ✗'}")
+            print(f"  VERDICT: {'ALL GATES PASS → PROCEED TO PHASE 2' if overall_pass else f'FAIL ({n_failed} gate(s) failed)'}")
+
+            results[feat_name] = {
+                "pass": overall_pass, "pearson": rho, "stats": tstat,
+                "n": len(valid), "coverage": coverage_pct, "best_tercile": best_tercile,
+            }
+
+    print(f"\n{'─'*60}")
+    print("PAIRWISE CORRELATIONS:")
+    for feat_name in [fd[0] for fd in feature_defs]:
+        for ref_key, ref_label, gate_name in [
+            ("obv_slope", "obv_slope_20", "G5a"),
+            ("avg_daily_vol", "avg_daily_vol_14d", "G5b"),
+        ]:
+            combined = [
+                (a[feat_name], a[ref_key]) for a in annotated
+                if a[feat_name] is not None and a[ref_key] is not None
+            ]
+            if len(combined) >= 10:
+                rho_x = pearson([c[0] for c in combined], [c[1] for c in combined])
+                if rho_x is not None:
+                    gate_pass = abs(rho_x) < 0.70
+                    print(f"  ρ({feat_name[:28]:28s}, {ref_label}): {rho_x:+.4f}  {gate_name}: {'PASS ✓' if gate_pass else 'FAIL ✗'}")
+
+    print("\n  Inter-feature correlations:")
+    feat_keys = [fd[0] for fd in feature_defs]
+    for i, f1 in enumerate(feat_keys):
+        for f2 in feat_keys[i+1:]:
+            combined = [(a[f1], a[f2]) for a in annotated if a[f1] is not None and a[f2] is not None]
+            if len(combined) >= 10:
+                rho_x = pearson([c[0] for c in combined], [c[1] for c in combined])
+                if rho_x is not None:
+                    print(f"    ρ({f1[:28]:28s}, {f2[:28]:28s}): {rho_x:+.4f}")
+
+    passing = [name for name, r in results.items() if r is not None and r["pass"]]
+    failed = [name for name, r in results.items() if r is not None and not r["pass"]]
+    skipped = [name for name, r in results.items() if r is None]
+
+    print(f"\n{'='*90}")
+    print("SUMMARY")
+    print(f"{'='*90}")
+    print(f"Features passing all gates: {passing if passing else 'NONE'}")
+    print(f"Features failing gates:     {failed if failed else 'NONE'}")
+    print(f"Features skipped:           {skipped if skipped else 'NONE'}")
+
+    if passing:
+        best = max(passing, key=lambda n: abs(results[n]["pearson"] or 0))
+        pearson_val = results[best]["pearson"]
+        obv_pearson_ref = 0.2349
+        weight_magnitude = round(0.05 * min(1.0, abs(pearson_val) / obv_pearson_ref), 2)
+        weight_magnitude = max(weight_magnitude, 0.02)
+        best_direction = results[best]["best_tercile"]
+        weight_sign = +1 if best_direction == "high" else -1
+
+        print(f"\nVERDICT: PROCEED TO PHASE 2")
+        print(f"  Best feature: {best}")
+        print(f"  Pearson: {pearson_val:.4f}")
+        print(f"  Direction: '{best_direction}' tercile is best → weight = {weight_sign * weight_magnitude:+.3f}")
+        print(f"  Suggested weight in V30 config: {weight_sign * weight_magnitude:+.3f}")
+    else:
+        print(f"\nVERDICT: ABORT — Trending/mean-reversion axis null on V24 {LOOKBACK_DAYS}d trade set")
+        print("  → V24 remains champion.")
+        print("  → Signal inventory exhausted from libs/features/market_features.py.")
+        print("  → Next Ralph iteration: gap_zscore hard-gate backtest (max_gap_zscore_20d filter)")
+        print("    or momentum_20d + grav_pull composite weight (both near-miss, orthogonal)")
+
+
+if __name__ == "__main__":
+    main()