Instead of starting the graph from 1st Jan, let's start from 1st May:
We get a very broad dispersion it seems. Let’s zoom into just the month of May... 
Instead of starting the graph from 1st Jan, let's start from 1st May:
We get a very broad dispersion it seems. Let’s zoom into just the month of May... 
1st May -> 1st June
(please excuse the unhelpful axis labelling)
I dont see a pattern here. Do you?
P.S. These are all log scale price axis (Y axis) 