Order types are instructions governing how a broker buys or sells securities, such as stocks and exchange-traded funds (ETFs). They determine whether an order seeks prompt execution, restricts the acceptable price, or activates after a price threshold is reached. The central trade-off is price control versus the risk of remaining unfilled.
Market Orders
A market order seeks to buy or sell at the best available prices when it reaches the market. It generally prioritizes prompt execution rather than price control. The displayed quote or last traded price is not a guaranteed fill price, particularly during volatility or when liquidity is limited. A larger order may fill in portions at different prices as available quantities are consumed. Trading halts, closed markets, or insufficient liquidity can delay or prevent immediate or complete execution.
Limit Orders
A limit order sets the least favorable price the investor will accept. A buy limit permits execution at the limit price or lower; a sell limit permits execution at that price or higher. Buy limits are often placed below the current market and sell limits above it, but these placements are not requirements.
A limit order that can trade against available prices may execute promptly. Otherwise, it waits for suitable prices while it remains active. Even if a reported market price touches the limit, available quantity and other orders ahead in the queue can prevent execution or allow only a partial fill.
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Get startedStop and Stop-Limit Orders
Stop and stop-limit orders are conditional order types: a price threshold activates them. A conventional stop order becomes a market order when its stop condition is met. Sell stops are normally placed below the current market and can support planned loss-limiting or profit-protecting exits. Buy stops are normally placed above the market and can initiate purchases after an upward move. The stop price is not a guaranteed fill price: gaps and slippage can lead to substantially worse execution, so a sell stop does not cap losses.
A stop-limit order has both an activation price and an execution-price limit. Once triggered, it becomes a limit order rather than a market order. Its limit controls acceptable fill prices, but a rapid move beyond that limit can leave the order unfilled and the position exposed. Hypothetically, a sell stop-limit with a $95 stop and $94 limit may activate after a gap to $90 but cannot sell below $94, leaving the holding unsold. Trigger rules can vary by broker and trading venue, so the applicable stop condition matters.
Duration and Profit Targets
Time-in-force is separate from order types: it specifies how long an order remains eligible for execution. A day order generally expires at the end of the applicable trading session if unfilled. Good-till-canceled (GTC) allows an eligible order to remain working beyond one session until filled, canceled, or ended under the broker's expiration rules. GTC does not mean unlimited duration, and limit and stop instructions are not inherently indefinite.
A take-profit instruction is a planned exit at a favorable target, often implemented as a sell limit for a long position. Its behavior depends on the underlying order rather than the take-profit label. As with other order types, reaching a target does not necessarily ensure a fill or a realized profit.
