diff --git a/diag_fun9_flank.py b/diag_fun9_flank.py
new file mode 100644
index 0000000..f7e8861
--- /dev/null
+++ b/diag_fun9_flank.py
@@ -0,0 +1,55 @@
+"""Why the translation limit did not fire on the exp(x) flank of fun9.5 ([2e-4, 81]).
+
+Every state the gate sees (trace hook) under a prestep, in order, with what the analogy
+reads there:
+  flag   r = f/f_prev >= 1/4 (sign kept) - the entry also needs the last step to be the model's
+  xi, phi   the configuration
+  ratio  d_past / d_line  (< 1: analogous to the nearest past configuration)
+  lx, lf the pair's x-scale and f-scale ratios (translation: lf < 1 <= lx)
+  m      the order read with translation=True
+Nothing in the method changes.
+
+    python -u diag_fun9_flank.py [problem] [prestep]
+"""
+from __future__ import annotations
+
+import math
+import sys
+
+from simroot.pure import _analogy_order, _config3, pure_root
+from sweep_full import MAXFEV, XTOL, load_problems
+
+
+def main(pid_want="fun9.5", pre="defect+flatanalogmempt+exp"):
+    for s, pid, f, a, b, _root in load_problems():
+        if pid != pid_want:
+            continue
+        st = {"trace": []}
+        pure_root(f, a, b, XTOL, MAXFEV, similarity="ratio", scale="derived3",
+                  guard="project", prestep=pre, stats=st)
+        print(f"== {pid}  {pre}  entries {st.get('stick_entries', 0)}")
+        past = []
+        for k, t in enumerate(st["trace"]):
+            cur = _config3(t["x"], t["fx"], t["xp"], t["fp"], t["xp2"], t["fp2"])
+            flag = t["fp"] != 0.0 and t["fx"] / t["fp"] >= 0.25
+            head = f"  {k:3d} x {t['x']:9.4f} f {t['fx']:+9.2e} {'F' if flag else '.'}"
+            if cur is None:
+                print(head + "  (no configuration)")
+                continue
+            line = abs(cur[1] - cur[0]) / math.sqrt(2.0)
+            if past:
+                q = min(past, key=lambda p: math.hypot(cur[0] - p[0], cur[1] - p[1]))
+                ratio = math.hypot(cur[0] - q[0], cur[1] - q[1]) / line if line > 0 else math.inf
+                lx = cur[2] / q[2] if q[2] > 0 else math.nan
+                lf = cur[3] / q[3] if q[3] > 0 else math.nan
+                m = _analogy_order(cur, past, translation=True)
+                ms = "none" if m is None else ("inf" if math.isinf(m) else f"{m:.2f}")
+                print(head + f"  xi {cur[0]:+8.3f} phi {cur[1]:+8.3f}  ratio {ratio:7.3f}"
+                      f"  lx {lx:7.3f} lf {lf:9.3e}  m {ms}")
+            else:
+                print(head + f"  xi {cur[0]:+8.3f} phi {cur[1]:+8.3f}  (no memory)")
+            past.append(cur)
+
+
+if __name__ == "__main__":
+    main(*sys.argv[1:3])
diff --git a/results_diag_fun9_flank.txt b/results_diag_fun9_flank.txt
new file mode 100644
index 0000000..d6ba6d6
--- /dev/null
+++ b/results_diag_fun9_flank.txt
@@ -0,0 +1,23 @@
+== fun9.5  defect+flatanalogmempt+exp  entries 1
+    0 x    0.0002 f -1.00e+00 .  (no configuration)
+    1 x   40.5001 f +3.88e+17 .  xi   +0.500 phi   +0.000  (no memory)
+    2 x   20.2502 f +6.23e+08 .  xi   +0.500 phi   +1.000  ratio   2.828  lx   0.500 lf 1.000e+00  m none
+    3 x   20.2501 f +6.23e+08 F  xi   -0.000 phi   -0.000  ratio 220240183.906  lx   0.000 lf 1.044e-16  m none
+    4 x   19.1406 f +2.05e+08 F  xi -17066711.549 phi -10310042.635  ratio   4.173  lx 17066711.549 lf 1.031e+07  m none
+    5 x   17.5571 f +4.22e+07 .  xi   -1.427 phi   -0.391  ratio   2.019  lx 24356112.465 lf 4.030e+06  m none
+    6 x   16.8250 f +2.03e+07 F  xi   -0.462 phi   -0.134  ratio   2.074  lx 11259747.544 lf 5.403e+05  m none
+    7 x   13.8231 f +1.01e+06 .  xi   -4.101 phi   -0.880  ratio   1.194  lx   1.896 lf 1.180e-01  m none
+    8 x   13.7422 f +9.29e+05 F  xi   -0.027 phi   -0.004  ratio   1.684  lx 1244198.603 lf 1.933e+03  m none
+    9 x   12.6156 f +3.01e+05 F  xi  -13.927 phi   -8.022  ratio   2.909  lx   0.375 lf 3.259e-02  m none
+   10 x   10.8903 f +5.36e+04 .  xi   -1.531 phi   -0.394  ratio   0.130  lx   1.090 lf 1.516e-03  m inf
+   11 x   10.3887 f +3.25e+04 F  xi   -0.291 phi   -0.085  ratio   1.229  lx   0.685 lf 9.668e-04  m none
+   12 x    5.1945 f +1.78e+02 .  xi  -10.357 phi   -1.527  ratio   1.007  lx   1.730 lf 1.677e-03  m none
+   13 x    2.5973 f +1.14e+01 .  xi   -0.500 phi   -0.005  ratio   0.384  lx   3.548 lf 7.623e-06  m inf
+   14 x    1.2988 f +1.66e+00 .  xi   -0.500 phi   -0.059  ratio   0.171  lx   0.500 lf 5.854e-02  m 4.09
+   15 x    0.6094 f -1.88e-01 .  xi   -0.531 phi   -0.189  ratio   0.364  lx   0.942 lf 8.437e-08  m 271.20
+   16 x    0.9527 f +5.82e-01 .  xi   +0.498 phi   +0.417  ratio   7.241  lx   0.008 lf 1.982e-18  m none
+   17 x    0.7352 f +6.75e-02 .  xi   +0.633 phi   +0.668  ratio  11.558  lx   0.633 lf 6.684e-01  m none
+   18 x    0.7039 f +1.36e-03 .  xi   -0.144 phi   -0.129  ratio  13.745  lx   0.063 lf 3.125e-06  m none
+   19 x    0.7032 f -2.25e-06 .  xi   -0.021 phi   -0.021  ratio  86.525  lx   0.008 lf 1.744e-08  m none
+   20 x    0.7032 f +1.38e-11 .  xi   +0.002 phi   +0.002  ratio 7135.750  lx  16.646 lf 5.551e-08  m none
+   21 x    0.7032 f +1.74e-16 .  xi   +0.000 phi   +0.000  ratio 165597.494  lx   0.000 lf 3.401e-13  m none