This sort of move is common with Bitcoin.
The lonely reason for such type of moves, is possibly coming from the exchanges margin trading and a mix of futures in the middle (some expire today).
The market is not regulated.
Unregulated exchanges operating margin tradings unfortunately have access to the margin trading users stop losses.
As the market is not regulated, and exchanges have access to the traders stop losses, nothing prevents them from "liquidating the shorts", and then sometimes they follow the "liquidate the shorts" with a "liquidate the longs" move.
And it creates this sort of uncommon pattern, a sort of "unnatural forced short squeeze".
Some call it the Bart Simpson as you probably heard of it. This is possibly the start of a Bart Simpson pattern, who knows.
The market is small, unregulated, this is the kind of move happening quite regularly. Nothing will change until a regulation ever happens with this market.
Welcome to Bitcoin.