diff --git a/js/module/directed_graph.js b/js/module/directed_graph.js
index 5782cd85689be6ce3d85edbbf8c7f53aa21b2c17..42923fc30f60e4e2e32567ad1fa3d89125dc3ab2 100644
--- a/js/module/directed_graph.js
+++ b/js/module/directed_graph.js
@@ -111,7 +111,7 @@ DirectedGraphTracer.prototype = $.extend(true, Object.create(Tracer.prototype),
 
         var wgap = 1 / (maxDepth - 1);
         var dfs = function (node, depth, top, bottom) {
-            place(node, depth * wgap, (top + bottom) / 2);
+            place(node, top + bottom, depth * wgap);
             var children = 0;
             for (var i = 0; i < G[node].length; i++) {
                 if (G[node][i]) children++;