I hope you can help me. I have been trying to get this working for quite some time.
I am taking the API from a website import it into google spreadsheets VIA importj
Im not really a javascript person, but I might have a little code that might help start you off. (Sorry if it does not help). What I use in my site is this (I changed it a little bit to incorporate your url).
$( document ).ready(function($) {
setInterval(function(){
$('.sell').load('http://api.796.com/v3/futures/ticker.html?type=weekly');
}, 5000);
});
This just grabs the JSON every 5 seconds, so be sure you parse the JSON and display the data you need. Hope this helps! :)