diff --git a/docs/HTML/DataFrame.html b/docs/HTML/DataFrame.html
index d0b47666..5d754055 100644
--- a/docs/HTML/DataFrame.html
+++ b/docs/HTML/DataFrame.html
@@ -775,10 +775,6 @@ <H2 ID="2"><font color="blue">API Reference with code samples <font size="+4">&#
       <td title="Calculates sum">struct <a href="https://htmlpreview.github.io/?https://github.com/hosseinmoein/DataFrame/blob/master/docs/HTML/SumVisitor.html">SumVisitor</a>{}</td>
     </tr>
 
-    <tr class="item" onmouseover="this.style.backgroundColor='#ffff66';" onmouseout="this.style.backgroundColor='#d4e3e5';">
-      <td title="Calculates rolling values of symmetric moving average">struct <a href="https://htmlpreview.github.io/?https://github.com/hosseinmoein/DataFrame/blob/master/docs/HTML/SymmTriangleMovingMeanVisitor.html">SymmTriangleMovingMeanVisitor</a>{}</td>
-    </tr>
-
     <tr class="item" onmouseover="this.style.backgroundColor='#ffff66';" onmouseout="this.style.backgroundColor='#d4e3e5';">
       <td title="Calculates tracking error">struct <a href="https://htmlpreview.github.io/?https://github.com/hosseinmoein/DataFrame/blob/master/docs/HTML/TrackingErrorVisitor.html">TrackingErrorVisitor</a>{}</td>
     </tr>
@@ -823,6 +819,10 @@ <H2 ID="2"><font color="blue">API Reference with code samples <font size="+4">&#
       <td title="Calculates Welford's algorithm mean">struct <a href="https://htmlpreview.github.io/?https://github.com/hosseinmoein/DataFrame/blob/master/docs/HTML/MeanVisitor.html">StableMeanVisitor</a>{}</td>
     </tr>
 
+    <tr class="item" onmouseover="this.style.backgroundColor='#ffff66';" onmouseout="this.style.backgroundColor='#d4e3e5';">
+      <td title="Calculates rolling values of symmetric moving average">struct <a href="https://htmlpreview.github.io/?https://github.com/hosseinmoein/DataFrame/blob/master/docs/HTML/SymmTriangleMovingMeanVisitor.html">SymmTriangleMovingMeanVisitor</a>{}</td>
+    </tr>
+
     <tr class="item" onmouseover="this.style.backgroundColor='#ffff66';" onmouseout="this.style.backgroundColor='#d4e3e5';">
       <td title="Calculates zero lag moving average">struct <a href="https://htmlpreview.github.io/?https://github.com/hosseinmoein/DataFrame/blob/master/docs/HTML/ZeroLagMovingMeanVisitor.html">ZeroLagMovingMeanVisitor</a>{}</td>
     </tr>