Stop orders can help you to limit your potential loss in an investment or to lock in profits. By setting an activation price below the market, if you are selling, you may be able to limit a potential loss should the stock price fall. Similarly, if you take a short position, you may be able limit a potential loss if the stock price rises by placing a buy-stop order.
Please note: The risk of loss on a short sale is potentially unlimited since there is no limit to the price increase of a security. There is no guarantee the brokerage firm can continue to maintain a short position for an unlimited time period. Your position may be closed out by the firm without regard to your profit or loss.
A stop market is an order which becomes a market order once the activation (or stop) price you specified has been reached or surpassed. Buy-stop market orders require you to enter an activation price above the current ask price. Sellers must enter the activation price below the current bid price.
A stop limit allows you enter two prices: an activation (or stop) price as well as a limit price. The activation and limit prices can be the same or you can choose a different limit price. A stop limit order becomes a limit order once the activation price has been reached or surpassed. Stop limit orders are accepted on stocks, as well as most options. When choosing stop limit, buyers must enter an activation price above the ask price. Sellers must enter an activation price below the current bid price.
Please Note: With a stop market order, there is no guarantee that the execution price will be equal to or near the activation price. Execution at a price different than the activation price is more likely to occur in conditions such as a fast-moving market, at market open or market close, or when trading has been halted on a security.