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.