Understanding Order Types: Market, Limit, Stop and Stop-Limit
An order is the tool that carries your idea into the market — know the types and you control price and pace on purpose.
7 min read
An order is nothing more than your instruction to the broker: "Buy or sell on my behalf." That sounds simple, but the difference lies in the detail. An order doesn't just say whether you're buying or selling — it also says whether a fast fill or an exact price matters more to you. And that is precisely what decides which order type fits, and whether you end up getting the price you expected.
In this guide we'll walk through the four most important order types: the market order, the limit order, the stop order (also called a stop-market) and the stop-limit. You'll learn when to use which, what the terms slippage and partial fill mean, and how to set up your entry, stop-loss and target as concrete orders with your broker. This isn't about a strategy — it's about the craft behind every trade.
The four order types and what they're for
At their core, order types differ on a single question: what matters more to you — that the order gets filled for sure, or that it only fills at a specific price? Each of the four types follows from that trade-off. Stop orders have one extra feature: they only become active once the price touches a threshold you've set — the so-called trigger, or trigger price.
One thing that helps to understand: "limit" always means a price boundary that must not be exceeded (when buying) or undercut (when selling). "Stop" means a threshold at which the order is first armed. So stop-market and stop-limit both combine a trigger with what happens once it's hit.
- Market order: filled immediately at the next best available price. You get a fill (almost) for sure, but not a guaranteed price. Useful when you definitely want in or out and the exact cent is secondary.
- Limit order: you set a target price. A buy fills only at this price or better (cheaper), a sell only at this price or better (more expensive). You control the price — but you risk the order not filling at all if the price never reaches your target.
- Stop order (stop-market): sits inactive in the system at first. Once the price touches your stop threshold, it automatically turns into a market order. The classic use: the stop-loss, the order that closes your position at a predefined loss.
- Stop-limit: like the stop order, but once triggered it becomes a limit order rather than a market order. So you set two prices — the trigger and the price boundary. More price control, but the risk that the order doesn't fill in fast moves.
Slippage and partial fills — the two terms worth knowing
Slippage is the difference between the price you expected and the price your order actually filled at. It happens mainly with market orders and with triggered stop-market orders, because these take the next best price. In calm, liquid markets slippage is usually small. Around news, at the open or in thinly traded instruments it can become noticeable — the price "jumps" and your order catches a worse level.
A partial fill means only part of your order gets filled, because there isn't enough on the other side (buyers or sellers) at your desired price. This typically affects limit orders: if you wanted ten contracts at a fixed price but only get six, the remaining four stay open until a matching counterparty shows up for those as well — or you cancel the order.
From this follows a practical rule of thumb. If you want certainty of execution, you use a market or stop-market order and accept possible slippage. If you want certainty of price, you use a limit or stop-limit order and accept that it may not fill, or fill only partially. Both at once — a guaranteed price and a guaranteed fill — simply doesn't exist.
Turning entry, stop-loss and target into concrete orders
In practice, a complete trade almost always consists of three orders: the entry, the stop-loss for protection, and the target (take-profit) for locking in gains. Here's how you typically set them up.
You can handle the entry in two ways. If you're already at your desired level and want in right away, you use a market order. If you'd rather get in at a specific, better price, you place a limit order at that level — then the order waits until the price "comes to pick you up."
You place the stop-loss as a stop order (stop-market). If you're long (positioned for rising prices), you put it below your entry; if you're short (positioned for falling prices), above it. Once the price touches that threshold, the position is closed automatically — even when you're not at the screen. You set the target as a limit order on the profit side. Many brokers bundle this construction as a so-called bracket order or OCO order ("one cancels the other"): when the target is hit, the stop is automatically cancelled — and vice versa. That way no forgotten order is ever left behind in the market.
- Long example: entry via a limit just below the current price, stop-loss as a stop order below it, target as a limit order above it.
- Short example: the mirror image — stop-loss as a stop order above the entry, target as a limit order below it.
- Use a bracket/OCO order so stop and target are linked and cancel each other out.
- Around important news, keep in mind: a stop-market can trigger with slippage — the actual loss may then turn out a bit larger than planned.
Common Misconceptions
- ✕Setting the stop-loss as a stop-limit and assuming it always takes effect. In a fast move the price can jump past the limit boundary — and then the position stays open even though the stop has "triggered."
- ✕Mixing up limit and stop direction: when buying, the buy limit belongs below the current price and the buy stop above it. Set it the wrong way round — buy limit above the price or buy stop below it — and the condition is met immediately, so you get filled straight away even though you actually wanted to wait for a different level.
- ✕Reaching for market orders by reflex in thinly traded instruments or around news, then being surprised by the slippage — the expected price and the price you get can differ sharply there.
- ✕Placing stop and target as two loose individual orders instead of as a linked bracket/OCO order. When one is hit, the other is left behind and can later open an unwanted new position.
Put It Into Practice with FlowTrader
Order types are a craft — and craft gets better through repetition and honest review. In FlowTrader you record, for each trade, which order type you used to get in and out, whether there was slippage or a partial fill, and whether your stop did its job as planned. After a few weeks your journal shows in black and white where your execution runs clean and where it's costing you money or nerves — for instance when market orders at the open keep filling worse than expected. That's how the dry topic of order types becomes a concrete, traceable part of your routine.
Try FlowTrader for freeUseful Calculators
Turn what you've learned straight into numbers with the free calculators.