@av._output_format<EOL><INDENT>@av._call_api_on_func<EOL>def get_digital_currency_monthly(self, symbol, market):<DEDENT>
_FUNCTION_KEY = '<STR_LIT>'<EOL>return _FUNCTION_KEY, '<STR_LIT>', '<STR_LIT>'<EOL>
Returns  the monthly historical time series for a digital currency
        (e.g., BTC) traded on a specific market (e.g., CNY/Chinese Yuan),
        refreshed daily at midnight (UTC). Prices and volumes are quoted in
        both the market-specific currency and USD..

        Keyword Arguments:
            symbol: The digital/crypto currency of your choice. It can be any
            of the currencies in the digital currency list. For example:
            symbol=BTC.
            market: The exchange market of your choice. It can be any of the
            market in the market list. For example: market=CNY.