Add support for crytocurrencies

[romeop555]

Find today this huge project and i would like to contribute and adopt it.

I'm building a trading engine, it is a C# UWP app running on Raspberry PI, so far it retrieves candles from the exchange every 4 hours and stores in your OneDrive folder in order to build a big prices database available for backtesting, the exchange allows you to retrieve only the last 12 hours for the minute period.

I can implement the retriever from the Kraken Exchange (well known for low commissions) if you like and you give me permissions.

Cheers!

[karlwancl]

@romeop555 Contributions are always welcomed 👍

It's interesting to hear about building a trading engine on a RaspberryPi using dotnet. Perhaps, it's also a time to take a look on the lib performance on resource-limiting environment 😏 Hopes it works smoothly on it 👍

[Ricky-G]

@lppkarl can we merge this with #9 and rename it to just "Add support for crytocurrencies", I would like to work on the cryptocurrencies side of things (one exchange at a time) in another branch and do a PR when ready.

[karlwancl]

@Ricky-G Sorry for the late response, the issue is being merged 😃