diff --git a/smd_fact_boosting.ipynb b/smd_fact_boosting.ipynb
index 58a05a1..dcd287c 100644
--- a/smd_fact_boosting.ipynb
+++ b/smd_fact_boosting.ipynb
@@ -714,6 +714,7 @@
     "\n",
     "plt.figure()\n",
     "plt.plot(scores, '.')\n",
+    "plt.axhline(np.max(scores), color='grey', linestyle='--')\n",
     "plt.ylabel('Accuracy')\n",
     "plt.xlabel('Iteration')\n",
     "None"