i have written a program in tkinter to draw stock graph,there are two strange thing i can't understand the attachment is 'AAU' data file(attachment 1).when you download it ,please save it in /tmp/AAU there is a scrolled canvas in it , 1.strang long line,please see my attachment. i have see my data ,my formulation ,no wrong,but the line is so long!! 2.there is no motion event reaction in the right of canvas,only motion event reaction in the left of canvas. 3.i have round function ,but the output is still more fractions than 2.