diff --git a/dual-token-model.ipynb b/dual-token-model.ipynb
index 5a1ec69..4681568 100644
--- a/dual-token-model.ipynb
+++ b/dual-token-model.ipynb
@@ -470,7 +470,7 @@
     "# YOU DON'T NEED TO READ THIS SECTION UNLESS YOU WANT TO KNOW THE IMPLEMENT DETAILS OF FIGURES\n",
     "class retial_investor(solution):\n",
     "    A=ipywidgets.widgets.FloatSlider(min=0, max=1000, step=10, value=100)\n",
-    "    G=ipywidgets.widgets.FloatSlider(min=0, max=100, step=1, value=2)\n",
+    "    G=ipywidgets.widgetstable_baselines.ACKTR('Mls.FloatSlider(min=0, max=100, step=1, value=2)\n",
     "    N=ipywidgets.widgets.FloatSlider(min=0, max=100, step=1, value=10)\n",
     "    I = ipywidgets.widgets.FloatSlider(min=10**6, max=10**8, step=10**6, value=10**7)\n",
     "    U = ipywidgets.widgets.FloatSlider(min=10**8, max=10**8, step=10**8, value=10**8)\n",
@@ -877,6 +877,13 @@
     "$$"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "As a result, NEO will hold the price of GAS when the price of GAS goes down, and GAS will hold the price of NEO when the price of NEO goes down because of the rational players."
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},