Quote from Buy1Sell2:
If someone is trading the ES and cannot take a 30 pt loss, then that individual should not be trading the ES and should rather be trading the cash index. Currently, a 30 point loss is roughly 2.17% of the face value of an ES contract. What would happen if there were another 911 and let's say the Globex goes down and doesn't reopen for 3 or 4 days? This might be a tragedy for everyone including the traders who thought that their stop would protect them. Trades should always be considered beforehand to be long term trades as a worst case scenario.