The USSR extended its sphere of influence into Yugoslavia and Albania by supporting the communist parties in those countries. Yugoslavia separated from the USSR later on after a fight between those who supported the USSR way of Communism, that is Stalin, and those who supported the socialistic way, that is Tito.
So, when were talking about a market order, we are talking about buying or selling an order to immediately at current market prices. So, we might want to imagine a scenario when the current market prices drop. However, we would always, in any scenario prioritize certainty of execution over the price of execution. The order is filled at the best price available at the relevant time.