private static void CryptocurrencyMarketPairsLatest()
        {
            Console.WriteLine("\nEnter symbol: ");
            var symbol = Console.ReadLine();

            var client   = new CryptocurrencyClient(ApiKey, Sandbox);
            var response = client.MarketPairsLatestBySymbol(symbol);
            var json     = JsonConvert.SerializeObject(response, Formatting.Indented);

            ShowResponseAndWait(json);
        }