public GlobalMarketView GetGlobalMarketView(string symbol = "")
        {
            string url     = GetUrl(Path_BaseGlobal);
            string convert = string.Empty;

            if (!string.IsNullOrEmpty(symbol))
            {
                convert = string.Format(OPR_Symbol, symbol);
            }

            var dataObj = CallService(url, convert);

            if (dataObj != null)
            {
                var obj = GlobalMarketView.GetObject(dataObj, symbol);
                return(obj);
            }
            else
            {
                return(null);
            }
        }