That site shows fluctuating daily averages over a month. This is what I meant be:
I want a chart that shows me one figure per month:
for e.g. what was the average bitcoin was worth in $USD for July 2016
I guess another way to put it is the mean amount for the month.
The original chart I gave an e.g. does this
http://www.statista.com/statistics/326707/bitcoin-price-index/
but
a) It doesn't detail where this data came from
b) it is a fixed 24 month period
c) It doesn't allow me to specify a period e.g show me the mean figure for each month from July 2013 - July 2016
Anyone out there any ideas??