So you want to build a trade data base. So be it,
but since you will be retrieving raw data there are
a few minor files you will first need to download.
Oh, by the way, you may be also be interested in
seeing what the data is
going to look like.
Since you will be downloading raw data, which are
just a bunch of numbers and letters, you will need
three associated files to build a relationship. This
will make the information somewhat more meaningful
to your boss.