private static String buildUrl(DataType dataType) {
        String url = serverUrl;
        switch (dataType) {
            case FOREX:
                url += "forex";
                break;
            case SPOL:
                url += "spol";
                break;
            case WSK:
                url += "wsk";
                break;
            case TWR:
                url += "twr";
                break;
        }

        return url;
    }