Using Orders to Initiate and Protect a Position

Once the outlook has chosen a position, orders carry it out. The same order types you already met do two distinct jobs, and only the placement and the intent change between them.

Two Jobs for the Order Ticket

Orders initiate a position (get you in) and protect it (limit the loss if the trade goes wrong). Splitting the job this way is the whole framework for the unit.

• Initiating orders: a market order enters immediately at the best available price (it guarantees a fill, not a price). A limit order enters only at a chosen price or better (it guarantees a price, but may not fill). A buy stop placed above the market or a sell stop placed below the market can also enter a position on a breakout or breakdown (buy strength, sell weakness).
• Protecting orders: the classic protective order is the stop, also called a stop-loss, placed on the far side of the position so it fires only when the market moves against you. It defines the exit and the maximum loss before you need them, which is the entire point of protecting a position.
• Time in force pairs with protection: a protective stop is usually left Good Till Canceled (GTC) so it stays working across sessions until the position is closed or the order is pulled, rather than expiring at the end of the day and leaving the position unguarded.

Protecting a Long: Sell Stop Below Entry

A long profits when price rises and is hurt when price falls. So the protective order sits below the market, in the direction of the loss.

• A sell stop (stop-loss) is placed below the entry price. If the market falls to the stop, the order triggers and sells to close the long, capping the loss at roughly the distance from entry to stop.
• This is the archetypal stop-loss on a long. Buy at, say, 1500, place a sell stop at 1485, and the worst-case loss is about 15 points before any slippage.

Protecting a Short: Buy Stop Above Entry

A short profits when price falls and is hurt when price rises. So the protective order sits above the market, again in the direction of the loss.

• A buy stop is placed above the entry price. If the market rises to the stop, the order triggers and buys to cover the short, capping the loss.
• This is especially important for a short, because a short's loss is otherwise theoretically unlimited (price has no ceiling). The buy stop above the market is what puts a lid on it.

Protective stop placement:

Memory Aid: The protective stop sits on the losing side. A long loses on the way down, so its stop hangs below like a safety net under the position. A short loses on the way up, so its stop caps it above like a ceiling. Picture the stop guarding the direction that hurts.

Exam Tip: Gotchas

• A protective stop on a LONG is a SELL stop placed BELOW the market, not above; a protective stop on a SHORT is a BUY stop placed ABOVE the market, not below. The stop always sits on the losing side of the position. Answer choices routinely flip the side or the direction, and "protect a long with a buy stop above" is backwards.

A Stop Guarantees a Fill, Not a Price

A plain stop is a fill mechanism, not a price mechanism, and the exam leans hard on that distinction.

• A plain stop becomes a market order the instant the stop price is reached (touched or traded through). Once it is a market order, it takes the next available price, so the exit is filled but the fill price is not guaranteed.
• In a fast or gapping market, the actual fill can be well past the stop level. A sell stop at 1485 might fill at 1480 if the market gaps down. This slippage is real: the protection guards against an open-ended loss, not against an exact exit price.

Think of it this way: a stop is a trigger, not a target. It promises that you will get out, but it does not promise the number you get out at. In quiet markets the two are close; in a gap they can separate.

• Stop-limit is the price-guaranteed cousin, with a catch. A stop-limit becomes a limit order when triggered, so it guarantees a price (or better) but may not fill at all if the market gaps straight past the limit, leaving the position open and exposed. Choosing between the two is choosing which risk to accept: a plain stop accepts slippage, a stop-limit accepts the risk of no fill. For pure protection where getting out matters most, the plain stop's guaranteed fill is usually preferred.
• Same mechanics, exchange or broker. On electronic markets a stop can be native (elected by the exchange match engine) or synthetic (simulated by the broker), but the placement and the "becomes a market order when triggered" behavior are identical.

Exam Tip: Gotchas

• A stop guarantees a FILL, not a price. Because it becomes a market order when the stop price is reached, in a fast or gapping market the fill can land well past the stop (slippage). It does not lock in the stop price. If a choice says a protective stop "guarantees you exit at the stop price," it is wrong. The price-guaranteed tool is the stop-limit, which in turn risks getting no fill.

Know the Exit Before You Need It

The discipline the exam rewards in "protect a position" is placing the protective stop when the trade is initiated, so the maximum loss is defined up front rather than improvised after the market has already moved.

• Set the protective stop at entry, and the worst case is a known number from the start.
• This matters doubly for a short, whose loss is otherwise theoretically unlimited. The buy stop above the market is what caps that exposure, so a short without one is running an open-ended risk.
• A plan that enters a position with no protective order is the weak answer, no matter how good the entry looks.

Exam Tip: Gotchas

• Place the protective stop when you initiate, not after the market turns. Entering with no protective order is the wrong choice on a "how do you protect this position" question, and it is worst for a short, where the buy stop above is the only thing capping an otherwise unlimited loss.