Whereas in the original SADF test the starting value of the window, r1, was fixed to 0, in the GSADF test the starting point can now vary from 0 to r2 − r0 (this is the last possible starting point, near the end of the data set, that allows the test to be run on the minimum window size).
Danial says there have been plenty of huge spikes followed by pullbacks in Bitcoin’s price since 2011. “What I expect from Bitcoin is volatility short-term and growth long-term.”

FACEBOOK WHISTLEBLOWER GOES PUBLIC: “The former Facebook Inc. employee who gathered documents that formed the foundation of The Wall Street Journal’s Facebook Files series said she acted to help prompt change at the social-media giant, not to stir anger toward it,” the Journal’s Jeff Horwitz wrote in a profile of Frances Haugen, a former product manager hired to help protect against election interference on the platform. She “said she had grown frustrated by what she saw as the company’s lack of openness about its platforms’ potential for harm and unwillingness to address its flaws. She is scheduled to testify before Congress on Tuesday. She has also sought federal whistleblower protection with the Securities and Exchange Commission.”
“Volatility is as old as the hills, and it’s not going anywhere,” Noble says. “It’s something you have to deal with.”