How and why I marked up this chart with drawing tools.
I started the first Fibonacci Speed Resistance Fan (FSRF) back to the lowest low I can scroll back to on 2015 January 14th when BTC was at $109.87. I ended the FSRF coordinates at the ATH on 2017 December 17th ($19,891.99). This makes for the lower angled FSRF rays on the chart. My up trending support line...
