When downloading from OST to Excel worksheets there are columns that one cannot use in any calculations because they are padded with spaces. Formatting to numbers does not work. If you go into share filter, any prices in the thousands are padded with blanks, as are one year historical volumes and trading values. You cannot for instance find max and mins. I have asked OST a week ago to change it back to how it used to be, but have had no response from them and things have not changed. How does one make oneself heard!? As to security when importing data, I have never had a problem.