tradingview在哪里替换后端的数据

Question

<script type="text/javascript">

            function getParameterByName(name) {
                name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
                var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
                    results = regex.exec(location.search);
                return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
            }

            TradingView.onready(function()
            {
                var widget = new TradingView.widget({
                    fullscreen: true,
                    symbol: 'AAPL',
                    interval: 'D',
                    container_id: "tv_chart_container",
                    //    BEWARE: no trailing slash is expected in feed URL
                    datafeed: new Datafeeds.UDFCompatibleDatafeed("https://demo_feed.tradingview.com"),
                    library_path: "charting_library/",
                    locale: getParameterByName('lang') || "en",

                    disabled_features: ["use_localstorage_for_settings"],
                    preset: "mobile",
                    overrides: {
                        "paneProperties.background": "#222222",
                        "paneProperties.vertGridProperties.color": "#454545",
                        "paneProperties.horzGridProperties.color": "#454545",
                        "symbolWatermarkProperties.transparency": 90,
                        "scalesProperties.textColor" : "#AAA"
                    }
                });
            })

        </script>