diff --git a/script/test/MultiplePlot.py b/script/test/MultiplePlot.py
index 1ce9c93..a397ced 100644
--- a/script/test/MultiplePlot.py
+++ b/script/test/MultiplePlot.py
@@ -26,18 +26,22 @@ def add_plot(x,y, name=None, clear = False):
     s.setLinesVisible(False)
     s.setPointSize(3)
     s.setData(x, y)        
- 
-    #Bounding box
-    x1,x2,y1,y2 = min(x), max(x), min(y), max(y)   
+
+    #Convex Hull
     #In the first time the plot shows, it takes some time for the color to be assigned
     while s.color is None:
         time.sleep(0.001)
-    bb = LinePlotSeries(name + " BBox", s.color)
-    p.addSeries(bb)              
-    bb.setLineWidth(2)
-    bb.setData([x1,x2, x2, x1, x1], [y1, y1, y2, y2, y1])    
-   
-    
+    hull = LinePlotSeries(name + " Hull", s.color)   
+    p.addSeries(hull)    
+    #Bounding box
+    #x1,x2,y1,y2 = min(x), max(x), min(y), max(y)   
+    #(hx,hy) = ([x1,x2, x2, x1, x1], [y1, y1, y2, y2, y1])            
+    (hx,hy) = convex_hull(x=x, y=y)
+    hx.append(hx[0]); hy.append(hy[0])                                
+    hull.setLineWidth(2)
+    hull.setData(hx,hy)    
+    hull.setColor(s.color)
+       
         
 clear_plot()
 x=[]