What Are Trading Order Types?
Trading order types are the instructions you send to the market: a market order buys or sells immediately at the best available price, while a limit order executes only at a specified price or better — and every other order type, from stops to brackets, is a combination of these two mechanisms. You can trade without a single indicator, but you cannot trade without knowing what kind of order you are placing, because mistakes between order types are expensive.
| Key point | Detail |
|---|---|
| Two base types | Market (immediate execution) and limit (price-controlled execution) |
| Stop orders | Not a separate type — a price condition that triggers a market or limit order |
| Trade-off | Market orders control speed but not price; limit orders control price but not execution certainty |
| Slippage | Affects market-type execution only; limit orders fill at your price or not at all |
| Combinations | OCO cancels one order when the other fills; brackets attach stop and target to an entry |
What Is a Market Order?
A market order is an instruction to buy or sell immediately at the best available price, guaranteeing execution but not the fill price. Buying fills against the Ask side; selling fills against the Bid side. In fast markets, your fill can be significantly worse than the price on screen because a market order collects volume from the whole order book: to buy 6 lots with 2 lots at $100.00, 2 at $100.01 and 4 at $100.02, your average fill is $100.01 — a blend, not the single price you saw.
What Is a Limit Order?
A limit order executes only at your specified price or better, guaranteeing price but not execution. Current price $100, Buy Limit at $99: if price drops to $99 with sellers there, you fill; if it bounces at $99.10, the order never executes. One detail many traders miss: a limit order can touch its price and still not fill when there is not enough counterparty volume at that exact level.
Stop Orders and Trigger Orders Explained
A stop order is not a separate order type but a price condition that activates another order: when price reaches the trigger level, the system sends either a market order or a limit order. The “stop” is just the activation switch. Some platforms use “Trigger” as a synonym for Buy/Sell Stop; check your platform’s documentation, as terminology varies.
| Dimension | Market order | Limit order | Stop (market) | Stop-limit |
|---|---|---|---|---|
| Execution | Immediate, guaranteed | Only at limit price or better | Guaranteed after trigger | Not guaranteed after trigger |
| Price control | None | Exact | None — can slip badly | Exact limit price |
| Placement | At current price | Below (buy) / above (sell) | Above (buy) / below (sell) current price | Same trigger as stop |
| Typical use | Fast entries/exits | Buying pullbacks, selling rallies | Breakout entries, stop losses | Breakouts with price control |
Example: current price $100. A Buy Stop at $102 triggers a market buy when price reaches $102 — but with thin liquidity you might fill at $102.30. A Buy Stop Limit at $102 places a limit buy at $102 instead: you get price certainty, but if price spikes through, your order sits unfilled and you miss the move.
MIT and LIT Orders
Market If Touched (MIT) and Limit If Touched (LIT) — common on cTrader and NinjaTrader — mirror stop orders in the opposite direction: price touches the trigger and a market (MIT) or limit (LIT) order is sent. A Buy Stop sits above the market; an MIT buy at the same level triggers when price reaches it from above. Traders use MIT to jump in near a “fat limit” in the order book without waiting for it to be eaten through.
Combined Order Structures: OCO and Bracket Orders
Two linked structures cover most retail needs:
- OCO (One Cancels the Other): two linked orders where filling one cancels the other — the standard way to attach a take profit and stop loss to the same position.
- Bracket orders: entry, stop loss and take profit created as a package; once the entry fills, the protective orders activate automatically.
Order Execution Policies: FOK, IOC and Return
When you send an order, the broker also needs a fill policy. Fill or Kill (FOK) executes the entire order immediately or cancels it entirely — used by large players avoiding multi-level fills. Immediate or Cancel (IOC) executes what is available now and cancels the rest: you want 10 lots, 6.3 are available, you get 6.3. Return leaves the unexecuted portion active, waiting for liquidity. Standard partial execution — filling through multiple trades until full volume — is the most common retail behavior.
Slippage: The Hidden Cost of Market Execution
Slippage is the difference between the price you expected and the price you got — the market’s natural response to order flow, not a bug. It hits hardest when a manual market order or a stop triggers during a fast move. It can be positive (fill at $99.90 when you wanted $100) or negative (fill at $100.30). Limit orders have no slippage by definition, but might not fill at all.
The Bottom Line on Choosing Order Types
Despite the names and terminal-specific variations, every trading order reduces to two building blocks: market execution (speed and certainty, price uncertainty) and limit execution (price certainty, no execution guarantee). Stops, triggers, OCO and brackets are just these mechanisms with activation conditions attached. Understanding the vocabulary matters more than most traders realize — the difference between a stop and a stop-limit determines whether you are in the trade or watching from the sidelines.
This article is for informational purposes only and does not constitute investment advice. Trading involves substantial risk. Only trade with money you can afford to lose.