Only ~9K shares traded so far—this isn’t normal price discovery, this is what illiquidity looks like when participation dries up. In these conditions, it doesn’t take much to control short-term price action.
The key point: this kind of setup cuts both ways. If the U.S. Supreme Court rules in favor of Amarin Corporation, the reaction won’t be gradual. With volume this thin, any positive ruling could force shorts to cover into a vacuum and trigger a sharp move higher.
Low volume does create the exact conditions where a surprise catalyst can hit hard and fast.