Additional Pairs and Exchanges

[guytp]

For those without full data (i.e. MT4 brokers like SFX) we should just import candlesticks

[guytp]

• Gdax: https://docs.gdax.com/#get-product-order-book
• Bitstamp: https://www.bitstamp.net/api/transactions/?sort=desc&offset=5000&time=day for live plus
  • https://www.kaiko.com/products/bitstamp-historical-trade-data for back fill /
  • https://bitcoincharts.com/about/markets-api/ /
  • https://api.cryptowat.ch/markets/bitstamp/btcusd/trades?since=0&limit=5000)
• Bittrex
• Cex.io
• OKCoin
• Quoinex
• SimpleFX
• Do we also want some FX here?