rrochon,
Below is some info I got from the Vanguard site about market, limit, stop, and stop-limit orders. Personally, I use limit orders or market orders.
From Vanguard
What is the difference between market and limit orders?
A market order is an order to buy or sell immediately at the best available price, whatever it is. A limit order is an order to buy or sell at a price you specify or better, but there is no guarantee that it will be executed.
What is the difference between stop and stop-limit orders?
You can use stop orders and stop-limit orders to help protect your profits and minimize losses, especially during periods of high market volatility. A stop order is an order to buy or sell at the market price, once a security has traded at, or passes, a price you specify (called the stop price). A stop order to buy is always entered at a price above the current offer price; a stop order to sell is always set at a price below the current bid price. The risk of stop orders is that they may be triggered by temporary market movements or may be executed at prices higher or lower than the stop price.
A stop-limit order combines a stop order and a limit order. A stop-limit order is an order to buy or sell at a specified price (called the stop-limit price) or better, but only after a given stop price has been reached or passed. This allows you to buy the stock no higher than the stop-limit price, or sell it no lower than the stop-limit price. The risk of a stoplimit
order is that the stock may never trade at the stop-limit price.
Lou