How about quantitative trading systems? I am really enjoying thinkering, back testing, inventing, I think this is the ultimate location independent lifestyle business...
The most used one is probable the Interactive Brokers API, I am using python and running the algos from VPS, for books on how to get started and data sources, please check my previous posts... Cheers.
I'm not the original parent but I'm doing the same. I'm using Oanda for forex data and building my platform in Elixir. I'm able to get historical pricing from Oanda for currency pairs so I'm able to eventually backtest that way.
