Prices can move without filled orders no problem as orders get cancelled. If market makers start pulling out, the order book can become extremely thin. For the

Prices can move without filled orders no problem as orders get cancelled. If market makers start pulling out, the order book can become extremely thin. For the passive traders that stay in they'll probably react much more strongly to trades on the book, so even if some liquidation makes it through much won't. Look at the GDAX ethereum crash for a recent real-live crypto example.