Creating a website. How can I automatically get the exchange rates of...

...different crypto coins and display them? I'm creating a website. My end goal is to have a website that looks like this one: http://coinmarketcap.com
I basically need to have the exact thing that this website has. How can I automatically get the exchange rates for all of these coins and have them displayed on my website.

Also, I'm going to be using wordpress to make the website, what is the plugin used to get the exchange rates? / scrape them?

Side note, the website I'm making has the same service as the above website, it just has a much better domain.