My understanding that stop order is market order triggered when price dropped to a certain level. if price is very violent and drops 100 points in a matter of second, Can you get order executed at specified price? what 's the risk here in sudden price movement in trading ES?
There are two types of STOP orders: Stop Market and Stop Limit. When the stop gets hit, one becomes a market order while the other a limit order. If you use a stop market order, you're liable to get a bad fill when the market is very volatile. With a stop limit order, you're most likely not get a fill at all. There's no risk of using stop. On the contrary, the biggest risk to you is being dumb not to use a stop. In the event of another Flash Crash, you definitely will lose everything.