This may occur, for example, at times of rapid price movement if the price for the underlying asset rises or falls in one trading session to such an extent that trading in the underlying asset is restricted or suspended. (nsfx.com)
Paradoxically, this wound - up appearance predicts the return of rapid price movement. (tradingday.com)
GDAX said it will establish a process to credit customer accounts that experienced margin call or stop loss orders as a direct result of the rapid price movement during the flash crash at 12:30 p.m. PST on June 21, 2017. (ethnews.com)