use 800 points in graph

js/ntpGraph.js

@@ -41,7 +41,7 @@ graphElements.forEach((elememt) => {
 
         }
     }
-    xhr.open("GET", "https://www.ntppool.org/scores/" + ip + "/json?monitor=*&limit=400");
+    xhr.open("GET", "https://www.ntppool.org/scores/" + ip + "/json?monitor=*&limit=800");
     xhr.send();
 });