https://docs.bitfinex.com/docs/open-source-libraries
https://medium.com/coinmonks/how-to-get-historical-crypto-currency-data-954062d40d2d
bitcoin get historical prices api
https://docs.bitfinex.com/docs/open-source-libraries
https://medium.com/coinmonks/how-to-get-historical-crypto-currency-data-954062d40d2d
bitcoin get historical prices api