diff --git a/script/local.py b/script/local.py
index fec92b7..78418ff 100755
--- a/script/local.py
+++ b/script/local.py
@@ -155,13 +155,15 @@ def clear_convex_hull_plot(title):
     if len(plots)>0:
         plots[0].clear() 
  
-def add_convex_hull_plot(title, x,y, name=None, clear = False):
+def add_convex_hull_plot(title, x,y, name=None, clear = False, x_range = None, y_range = None):
     plots = get_plots(title = title)
     p = None
     if len(plots)==0:
         p = plot(None,name=name, title = title)[0]       
-        p.getAxis(p.AxisId.X).setRange(-50,150)
-        p.getAxis(p.AxisId.Y).setRange(-50,150)
+        if x_range is not None:
+            p.getAxis(p.AxisId.X).setRange(x_range[0], x_range[1])
+        if y_range is not None:
+            p.getAxis(p.AxisId.Y).setRange(y_range[0], y_range[1])
         p.setLegendVisible(True)       
     else:
         p = plots[0]