A limit order is an instruction to buy or sell only at a specific price or better, rather than at whatever price is available right now. A buy limit order fills only at your set price or lower; a sell limit order fills only at your set price or higher. The trade-off is simple: a limit order gives you control over the price you pay or receive, but it may never fill if the market does not reach your level. It is the main alternative to a market order, which fills immediately at the current price. This guide explains how limit orders work and when to use them.
Key points:
- A limit order sets the worst price you will accept: buy at your price or lower, sell at your price or higher.
- It guarantees the price but not the fill; the order only executes if the market reaches your level.
- A market order does the opposite: it guarantees the fill but not the exact price.
- Limit orders help you avoid overpaying, control entries and exits, and reduce the cost of a wide spread.
What is a limit order?
When you place a limit order, you tell your broker the maximum you are willing to pay to buy, or the minimum you are willing to accept to sell. The order sits in the market waiting, and it executes only if the price reaches your limit or something better. Say a share is trading at 102p and you would only buy at 100p. A buy limit order at 100p will wait, and it fills only if the price drops to 100p or lower. If the price never falls that far, the order simply does not execute. This is the key feature: you are trading the certainty of getting filled for control over the price.
Limit order vs market order
The two basic order types sit at opposite ends of a trade-off between price and certainty.
| Limit order | Market order | |
|---|---|---|
| Guarantees | The price (or better) | The fill (executes now) |
| Does not guarantee | That it will fill | The exact price |
| Best for | Getting a specific price, patient entries | Speed, when getting in matters most |
| Main risk | Missing the trade | Slippage in fast markets |
A market order is right when getting into or out of a position quickly matters more than a small price difference. A limit order is right when the price you get matters more than being certain of a fill. In fast-moving or thinly traded markets, a market order can suffer slippage, filling at a worse price than you expected, which is exactly what a limit order protects against.
Buy limit and sell limit orders
- Buy limit. Placed below the current price. You are saying you will only buy if the price falls to your level, useful for buying a dip rather than chasing the price up.
- Sell limit. Placed above the current price. You are saying you will only sell if the price rises to your level, useful for taking profit at a target without watching the screen.
Limit orders are also how many traders set profit targets: you can place a sell limit at the price where you want to take profit, and it will execute automatically if the market gets there. This pairs naturally with a stop-loss on the downside, so both your exit points are set in advance.
When should you use a limit order?
- To control your entry price. When you have a specific level you want to buy or sell at and are willing to wait.
- To avoid a wide spread. In markets with a large gap between the buy and sell price, a limit order can get you a better fill than paying the market spread.
- To take profit automatically. Setting a sell limit at your target means you do not have to watch the market to exit.
- In volatile or thin markets. Where a market order risks poor execution, a limit order caps the price you accept.
The main downside is opportunity cost: if the market moves away from your limit without touching it, you miss the trade entirely. A trader waiting to buy at 100p can watch the price rise away from 102p and never come back, having saved 2p on a trade they never actually got. Choosing between a limit and a market order is really about which risk you would rather take: missing the trade, or paying a slightly worse price to be sure of it.
Related reading
- Stop-loss orders: where to place them and the trade-offs involved
- How to choose a broker: a practical checklist for UK traders
Frequently asked questions
What is the difference between a limit order and a stop order?
A limit order buys or sells at a set price or better, so a buy limit sits below the current price and a sell limit above it. A stop order does the reverse: it triggers a trade once the price reaches a level, typically to cut a loss or enter on a breakout, so a sell stop sits below the current price. In short, limit orders aim for a better price, while stop orders react once a price is hit. Many platforms also offer a stop-limit order that combines the two.
Do limit orders always get filled?
No, and that is the key limitation. A limit order only executes if the market reaches your specified price or better. If the price never gets there, the order stays open and unfilled, and you miss the trade. Even when the price does touch your level, a very fast move or thin liquidity can occasionally mean only part of the order fills. Limit orders trade the certainty of execution for control over price.
Is a limit order safer than a market order?
It is safer in one specific way: it protects you from paying a worse price than you intended, which matters most in volatile or thinly traded markets prone to slippage. It is not safer overall, because it introduces a different risk, that the order never fills and you miss the move. Neither order type is universally better; each suits different situations, and experienced traders use both depending on whether price or certainty matters more for that trade.
This article is educational and not financial advice. Trading carries risk and most retail accounts lose money. VLT Markets is a publisher, not a broker.
