Display camel graph inside amazon product pages

amazon_camel_graph.user.js

// ==UserScript==
// @name        Amazon Camel Graph Revived/Fixed
// @version     1.3.0
// @description Add CamelCamelCamel graph + link to Amazon product pages.
// @namespace   https://gist.github.com/skyghis/3ffdf6d93d83d4616212ec7a6da8e690
// @updateURL   https://gist.github.com/skyghis/3ffdf6d93d83d4616212ec7a6da8e690/raw
// @include     http*://www.amazon.*/*
// @icon        https://camelcamelcamel.com/favicon.ico
// @author      SkyghiS
// @homepageURL https://gist.github.com/skyghis/3ffdf6d93d83d4616212ec7a6da8e690
// ==/UserScript==

var country = document.domain.split('.').slice(-1)[0];
country = country == 'com' ? 'us' : country;
var asin = document.getElementById('ASIN').value;

var camelGraph = document.createElement('img');
camelGraph.src = '//charts.camelcamelcamel.com/' + country + '/' + asin + '/amazon-new.png?legend=1&fo=1&w=700';

var camelLink = document.createElement('a');
camelLink.target = 'blank';
camelLink.href = '//' + country + '.camelcamelcamel.com/product/' + asin;
camelLink.appendChild(camelGraph);

var camelDivGraph = document.createElement('div');
camelDivGraph.style.marginLeft = '-10px'
camelDivGraph.appendChild(camelLink);

var camelToggle = document.createElement('i');
camelToggle.classList.add('a-icon');
camelToggle.classList.add('a-icon-section-collapse');
camelToggle.style.cursor = 'zoom-out';
camelToggle.onclick = function() { 
    camelToggle.classList.remove('a-icon-section-collapse', 'a-icon-section-expand');
    if (camelDivGraph.style.display === 'none') {
        camelToggle.classList.add('a-icon-section-collapse');
        camelToggle.style.cursor = 'zoom-out';
        camelDivGraph.style.display = '';
    } else {
        camelToggle.classList.add('a-icon-section-expand');
        camelToggle.style.cursor = 'zoom-in';
        camelDivGraph.style.display = 'none';
    }
}; 

var camelDivInfos = document.createElement('div');
camelDivInfos.style.marginLeft = '-10px'
camelDivInfos.appendChild(camelToggle);

var destination = document.getElementById('unifiedPrice_feature_div');
destination.appendChild(camelDivInfos);
destination.appendChild(camelDivGraph);

Exactly what I was looking for since the official Firefox Add-on doesn't work for my country. Thanks!