Latest price for a symbol or symbols.

        https://github.com/binance-exchange/binance-official-api-docs/blob/master/rest-api.md#symbol-order-book-ticker

        :param symbol:
        :type symbol: str

        :returns: API response

        .. code-block:: python

            {
                "symbol": "LTCBTC",
                "bidPrice": "4.00000000",
                "bidQty": "431.00000000",
                "askPrice": "4.00000200",
                "askQty": "9.00000000"
            }

        OR

        .. code-block:: python

            [
                {
                    "symbol": "LTCBTC",
                    "bidPrice": "4.00000000",
                    "bidQty": "431.00000000",
                    "askPrice": "4.00000200",
                    "askQty": "9.00000000"
                },
                {
                    "symbol": "ETHBTC",
                    "bidPrice": "0.07946700",
                    "bidQty": "9.00000000",
                    "askPrice": "100000.00000000",
                    "askQty": "1000.00000000"
                }
            ]

        :raises: BinanceRequestException, BinanceAPIException

def get_orderbook_ticker(self, **params):
        """Latest price for a symbol or symbols.

        https://github.com/binance-exchange/binance-official-api-docs/blob/master/rest-api.md#symbol-order-book-ticker

        :param symbol:
        :type symbol: str

        :returns: API response

        .. code-block:: python

            {
                "symbol": "LTCBTC",
                "bidPrice": "4.00000000",
                "bidQty": "431.00000000",
                "askPrice": "4.00000200",
                "askQty": "9.00000000"
            }

        OR

        .. code-block:: python

            [
                {
                    "symbol": "LTCBTC",
                    "bidPrice": "4.00000000",
                    "bidQty": "431.00000000",
                    "askPrice": "4.00000200",
                    "askQty": "9.00000000"
                },
                {
                    "symbol": "ETHBTC",
                    "bidPrice": "0.07946700",
                    "bidQty": "9.00000000",
                    "askPrice": "100000.00000000",
                    "askQty": "1000.00000000"
                }
            ]

        :raises: BinanceRequestException, BinanceAPIException

        """
        return self._get('ticker/bookTicker', data=params, version=self.PRIVATE_API_VERSION)