That is a risk if you buy low and sell high, but if you buy and hold for a few days it's pretty safe. Worst case you lose buying power for a short time. But yo

That is a risk if you buy low and sell high, but if you buy and hold for a few days it's pretty safe. Worst case you lose buying power for a short time. But you are right that regulators (not sure if breaking trades is an exchange or SEC thing?) do reduce this natural damping factor.