Re: Segwit Adoption. I looked at some data, and we are not there yet.
Which platform do you use? You are making nice graphics. It is not easy to do that in excel, unless you have a super computer (excel is so slow). powerbi?
You can use Stata, SPSS, R or Python. If you have good experience with Python, there are packages for you to use (on Python and on R as well).Excel is not good to play with plots and analyses.
I had problems with this chart as well. Those spikes are probably a data problem as I have them in my charts as well.
You can try with different recasting options (area, line, connected, scatter) and choose an option that gives you best plots. 