This is one of the most interesting case studies of 50% Retracements together at once that I can remember that Bitcoin is demonstrating over the last week.
The first Retracement Level was a rally off the recent low up to the time of the FOMC Meeting.
The second was the Crash as JPow was speaking.
The Current rally stopped at the 50% Retracement of the JPow speech.
This goes in my log book for case studies and if you study price action I suggest you do the same.