diff --git a/analysis.ipynb b/analysis.ipynb
index 8455ea4e..a31ea253 100644
--- a/analysis.ipynb
+++ b/analysis.ipynb
@@ -134,6 +134,7 @@
     "ax.grid(True, alpha=0.2)\n",
     "\n",
     "# Y-axis: from just below best to just above baseline\n",
+    "best = running_min.iloc[-1]\n",
     "margin = (baseline_bpb - best) * 0.15\n",
     "ax.set_ylim(best - margin, baseline_bpb + margin)\n",
     "\n",