Thank you for your advice.
According to your idea, I have make the code in M file as below:
"
clear;clc;
load 'ctgs2.txt';
r=size(ctgs2,1);
figure;
highlow(ctgs2(1:r,3),ctgs2(1:r,4),ctgs2(1:r,5),ctgs2(1:r,2),'r',ctgs2(1:r,1),2);
xlabel('Date);
ylabel('This Stock's Price');
title('This...