What is a limit order?
A limit order is patience written into the order book. It is the tool that lets you buy the pullback instead of the breakout, earn the spread instead of paying it, and decide your price in advance — provided you can live with the trade that never happens.
Will a limit order always fill?
No, and understanding why saves money. A buy limit at $77,000 with price at $77,500 sits in the book behind every other order already resting at $77,000. Price must trade down to $77,000 and enough size must be sold there to reach your place in the queue. If price touches $77,000 and bounces, orders ahead of you fill and yours does not. If price never gets there, you simply do not have a position — which is a cost too, just an invisible one: the trade that ran without you.
Market order or limit order — which one for which job?
| Market order | Limit order | |
|---|---|---|
| Guarantees | Execution | Price (or better) |
| Fee | Taker (higher) | Maker (lower, sometimes a rebate) |
| Spread | You pay it | You can earn it |
| Slippage | Possible | None — the price is capped |
| Risk | Bad fill in thin or fast markets | No fill; missed move |
| Best for | Exits, protective stops, liquid entries | Planned entries at levels, take-profits, patient exits |
Fees vary by exchange and volume tier; the ranking (maker below taker) holds almost everywhere.
What is a marketable limit order?
A limit order placed at or through the current best price. A buy limit at $77,502 when the best ask is $77,500.5 fills immediately like a market order — but never above $77,502, however thin the book is. It is the professional's default for entries: the speed of a market order with a ceiling on the damage. Worked example: on the two-level book from the market order page, a marketable limit at $77,501.0 fills 0.10 BTC at an average of $77,500.75, exactly like the market order; set the limit at $77,500.5 and only the first 0.05 BTC fills, the rest waits.
When does a limit order hurt you?
As a protective stop. A stop-limit order becomes a limit order when triggered, and in a crash the market can gap straight through your limit price, leaving the order unfilled while the position keeps losing. Protective exits should be stop-market. Limit orders also hurt when you keep moving them to chase price — at that point you have a slow, expensive market order with extra steps. Set the level from the chart, leave it, and accept the miss if it comes.
FAQ
Is a limit order cheaper than a market order? Usually. Most exchanges charge a lower maker fee for resting orders and some pay a rebate, and a resting order earns rather than pays the spread. The saving can exceed the exchange fee itself on active accounts.
What is post-only? An option that cancels the order if it would fill immediately as a taker, guaranteeing you keep the maker fee. Useful for fee-sensitive strategies; irrelevant for a beginner's first trades.
Can I use a limit order as a stop-loss? You can, as a stop-limit — but you should not for protection. In a fast fall the limit may never fill. Use a stop-market for exits that must happen.
Plan the level before you place the order
The trade planner takes entry, stop and target and returns size, R:R and a pass/fail on the structure — before the order exists.
Every key term, one roadmap
The whole slide course — ten free PDF parts, 328 pages.
Limit orders are how a plan becomes a position without emotion at the button. Lesson 6 covers the three order types together, Lesson 12 shows where the levels worth resting an order at actually are, and take-profit is the limit order that closes the trade.