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What is a stop order?

A stop order waits until a stock trades at a price you choose, the stop price, and then becomes a market order to buy or sell.

A sell stop sits below the current price. Its most common use is the stop-loss, which closes a position if the price falls. A buy stop sits above the current price and buys only if the price rises to it.

Worked example

A stock trades at $50. You decide a move above $55 would matter, so you place a buy stop for 20 shares at $55. Nothing happens while the price stays below $55. When a trade reaches $55, the stop triggers and buys 20 shares at the market, for about $1,100.

If the price jumps from $54 to $57 on news, the order fills near $57, not $55. A stop sets when the order starts, not the price you get.

Practice it on JagSim

JagSim has stop orders to buy and to sell. A waiting stop is checked against every minute of trading since you placed it. When a trade reaches your stop, it fills as a market order: at the stop price when the price moves through it, or at the first trade past it when the price jumps. Stop orders for stocks fill in the regular session only, and the order box refuses a stop that is already on the wrong side of the price. A stop can be Day or Good til canceled. JagSim has no stop-limit or trailing stop orders. How trading works on JagSim.

FAQ

What is the difference between a stop order and a limit order?

A limit order sets the worst price you will accept and may not fill. A stop order sets the price at which a market order starts, and then fills at whatever the market gives.

What is the difference between a stop order and a stop-loss?

A stop-loss is one use of a stop order: a sell stop placed below your buy price to cap a loss. A stop order is the order type, and it can also buy. See stop-loss.

What is a stop-limit order?

A stop that becomes a limit order instead of a market order when it triggers. It will not fill past your limit, but it may not fill at all. JagSim does not offer stop-limit orders.

Can a stop order fill at a worse price than the stop?

Yes. Once triggered it is a market order, so in a gap or a fast move it fills at the next available price, which can be well past the stop.

Related terms
Practice it on JagSim →

Last updated: October 2026

Educational only. Not investment advice. JagSim is a simulator, not a broker.

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