Скрипт

// ==UserScript==
// @name         CryptoTable
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://bitinfocharts.com/ru/markets/
// @grant        none
// @run-at      document-idle
// ==/UserScript==

(function() {
    'use strict';

    var currencies = {
        "BTC": "Bitcoin",
        "ETH": "Ethereum",
        "ETC": "Ethereum Classic",
        "ZEC": "Zcash",
        "BCH": "Bitcoin Cash",
        "BCC": "Bitcoin Cash",
        "BTG": "Bitcoin Gold",
        "DASH": "Dash",
        "NEO": "NEO",
        "LTC": "Litecoin",
        "XMR": "Monero",
        "OMG": "Omise-go"
    };

    var currencies_set = {
        "BTC": false,
        "ETH": false,
        "ETC": false,
        "ZEC": false,
        "BCH": false,
        "BCC": false,
        "BTG": false,
        "DASH": false,
        "NEO": false,
        "LTC": false,
        "XMR": false,
        "OMG": false
    };

    var markets = {
        "bittrex": "Bittrex",
        "hitbtc": "HitBTC",
        "yobit": "YoBit"
    };

    var data = {};
    var minmax = {};

    function prepare() {
        $('table#t1 tr').each(function(i, el) {
            var cur = $($(el).find("td:eq(1)")).data("val");
            if (!(cur in currencies))
            {
                $(el).remove();
            }
        });
        $('body').append("<div id='sub-tables'></div>");
        $('table#t1 tr').each(function(index,el){
            $("#sub-tables").append($(el).data("content")); $(el).popover("destroy");
            $('#sub-tables table tr').each(function(i, el){
                var market = $(el).find("td:eq(1)").text();
                if (!(market in markets))
                {
                    $(el).remove();
                }
                else
                {
                    var pair = $(el).find("td:eq(0)").text();
                    var second=pair.split("/")[1];
                    if (!(second in {"USD":"$", "EUR":"Euro", "USDT":"T$"}))
                    {
                        $(el).remove();
                    }
                }
            });
        });

    }

    function read_data()
    {
        data = {};
        minmax = {};
        for (var cur in currencies) {
            data[cur] = {};
            currencies_set[cur] = false;
            for (var market in markets) {
                data[cur][market] = {
                    "buy": {"USD":0, "EUR":0},
                    "sell": {"USD":0, "EUR":0}
                };
            }
        }

        $('#sub-tables table tr').each(
            function(i, el)
            {
                var pair = $(el).find("td:eq(0)").text();
                var currency =pair.split("/")[0];
                var money=pair.split("/")[1];
                if (money == "USDT") money = "USD";
                if (currency == "BCC") currency = "BCH";

                var market = $(el).find("td:eq(1)").text();
                var buy=parseFloat($(el).find("td:eq(3)").text().replace(",", "").replace(/USD|RUR|EUR/, ""));
                var sell=parseFloat($(el).find("td:eq(4)").text().replace(",", "").replace(/USD|RUR|EUR/, ""));
                if (currency in currencies && market in markets)
                {
                    data[currency][market].buy[money] = buy;
                    data[currency][market].sell[money] = sell;
                    if (buy || sell)
                    {
                        currencies_set[currency] = true;
                    }
                }
            }
        );
        $('#sub-tables').remove();
        console.log(data);
    }

    function show_data(){
        console.log(data);
        if ($("#data-window").length == 0)
        {
            $('body').append("<div id='data-window' style='z-index:9000;position:absolute; left:0px; top:0px; width:100%; height:100%; background-color:rgba(255,255,255,192);text-align:center;'></div>");
        }
        var c = "<style>table#cdata td { border:1px solid black; padding:5px; } table#cdata {position:relative; left:50%; margin-left:-250px;}</style>";
        c += "<div id='reloader' style='visibility:hidden;color:#dd0000;'>Перезагрузка данных...</div><table id='cdata'><tr><td rowspan=2>КриптоВалюта</td><td colspan='" + Object.keys(markets).length + "'>Биржи</td></tr>";
        c += "<tr>";
        for (var market in markets)
        {
            c += "<td>" + markets[market] + "</td>";
        }
        c += "</tr>";

        for (var currency in currencies)
        {
            if (!currencies_set[currency]) continue;
            c += "<tr><td rowspan=2>" + currencies[currency] + "</td>";
            var max_buy = 0;
            var min_buy = 999999;
            var max_buy_market = "";
            var min_buy_market = "";
            var max_sell = 0;
            var min_sell = 999999;
            var max_sell_market = "";
            var min_sell_market = "";
            for (market in markets)
            {
                if (data[currency][market].buy.USD > max_buy)
                {
                    max_buy = data[currency][market].buy.USD;
                    max_buy_market = market;
                }
                if (data[currency][market].buy.USD < min_buy && data[currency][market].buy.USD)
                {
                    min_buy = data[currency][market].buy.USD;
                    min_buy_market = market;
                }
                if (data[currency][market].sell.USD > max_sell)
                {
                    max_sell = data[currency][market].sell.USD;
                    max_sell_market = market;
                }
                if (data[currency][market].sell.USD < min_sell && data[currency][market].sell.USD)
                {
                    min_sell = data[currency][market].sell.USD;
                    min_sell_market = market;
                }
            }

            for (market in markets)
            {
                c += "<td>BUY:";

                for (var cur in data[currency][market].buy)
                {
                    if (data[currency][market].buy[cur])
                    {
                        var color=(market == max_buy_market) ? "green" : (market == min_buy_market ? "red":"black");
                        c += "<span style='color:" + color + "'>" + data[currency][market].buy[cur] + " " + cur + ", </span>";
                    }
                }
            }
            c += "</tr><tr>";
            for (market in markets)
            {
                c += "<td>SELL:";
                for (cur in data[currency][market].sell)
                {
                    if (data[currency][market].sell[cur])
                    {
                        var color=(market == max_sell_market) ? "green" : (market == min_sell_market ? "red":"black");
                        c += "<span style='color:" + color + "'>" + data[currency][market].sell[cur] + " " + cur + ", </span>";
                    }
                }
                c += "</td>";
            }
            c += "</tr>";
        }
        c += "</table>";

        $("#data-window").html(c);

    }

    function appendHtml(el, str) {
        var div = document.createElement('div');
        div.innerHTML = str;
        while (div.children.length > 0) {
            el.appendChild(div.children[0]);
        }
    }
    var html = "<div id='first-loader' style='z-index:9000;position:fixed; left:0px; top:0px; width:100%; height:100%; padding-top:150px; background-color:#FFFFFFFF;text-align:center;'>Первичная загрузка...</div>";
    appendHtml(document.body, html);

    function load_courses(filename, callback){
        $.getJSON(filename, function(data) {
            $.each(data, function(key, val) {
                if (document.getElementById("tr_" + key)) {
                    $("#tr_" + key).data("content", data['table_header'] + val);
                }
            });

            callback();
        });
    }

    function reloadPage(){
        $('#reloader').css("visibility", "visible");
        $.get(document.location.href, function(result) {
            var begin = result.search(/<div[^>]*?id='markets_container'>/);
            var end = result.search(/<div[^>]*?><small>[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}/);
            var content = result.substr(begin, end-begin);
            $('#markets_container').replaceWith(content);
            $('#sub-tables').remove();

            var match = /\$\.getJSON\ *\(\ *"([^"]+)",/.exec(result);
            var filename = match[1];
            load_courses(filename, function(){
                setTimeout(function(){
                    prepare();
                    read_data();
                    show_data();
                    $('#reloader').css("visibility", "hidden");
                    setTimeout(function() {
                        reloadPage();
                    }, 30000);
                },2000);
            });

        });
    }

    $(function(){
        setTimeout(function() {
            prepare();
            $("#first-loader").remove();
            read_data();
            console.log(data);
            show_data();
        }, 2000);
        setTimeout(function() {
            reloadPage();
        }, 10000);
    });
})();