Each json response is a list of lists.
Each element of the top level list represents a trading period as defined in the query params with value i.
the number of elements in the list is based of of the query param r.
The r value is days back as an integer
the i value is interval period and appears to be enumerated values that are allowed include but may not be limited too (additionally i can be left blank and it will auto scale, but the autoscaling size is not reported):
30-minhourlydaily2-hour
each element of the top level list features 8 elements (as of 1/13/2018 at 5PM PST) Those elements represent
- timestamp in epoch seconds
- Open
- High
- Low
- Close
- Volume (BTC)
- Volume (Currency)
- Weighted Price
The plotting library used is a custom fork of plotille. The modifications make the axis values more appropriate for the data type. Including reducing the number of decimal points on the y axis and making the x axis show dates