Order
Instruction to buy or sell an asset under stated conditions.
An order is an instruction to buy or sell an asset according to specified conditions. It identifies the market, side, quantity, and usually an order type or price rule. Submitting an order does not guarantee execution because available liquidity, venue rules, account limits, and market movement affect whether and how it fills.
A market order seeks immediate execution against the best available prices. It prioritizes speed but does not guarantee the price shown when the order was submitted. A limit order sets the highest price a buyer will pay or the lowest price a seller will accept. It offers price control, although the market may never reach it or there may not be enough quantity to fill it fully.
Conditional orders include stops, stop-limits, and take-profit instructions. A stop order becomes active after a trigger price, but its eventual fill can be much worse during a gap or sharp move. A stop-limit adds a price boundary, which prevents an extreme fill but may leave the position open. These tools automate instructions, not outcomes, and do not remove market risk.
Orders matter because execution can materially change the result of a trade. Buying a large amount in a thin market can move through several ask levels, creating slippage. Fees may differ for makers who add liquidity and takers who remove it. Partial fills can leave an unexpected position, and minimum quantities or price increments may cause a venue to reject an instruction.
Time-in-force controls how long an order remains active. Good-till-canceled orders stay open until filled or canceled, subject to venue limits. Immediate-or-cancel orders fill available quantity immediately and cancel the rest, while fill-or-kill orders require the entire amount at once. Traders should also confirm whether editing an order loses queue priority and whether triggered orders rely on last, mark, or index price.
Before submitting, verify the asset pair, side, size, price, fees, and settlement currency. Review open orders after volatile moves and cancel stale instructions that no longer fit the plan. On decentralized venues, inspect token approvals, gas, deadline, slippage settings, and transaction status. A well-chosen order controls part of the execution process, but liquidity and market conditions still determine the final result.
Frequently asked questions
- Common choices include market orders for immediate execution and limit orders that set a maximum purchase or minimum sale price. Stop and stop-limit orders activate after a trigger. Time-in-force options include good-till-canceled, immediate-or-cancel, fill-or-kill, and day orders. Availability and definitions vary by venue, so read the platform's exact execution rules before trading.
- Choose based on whether speed, price control, or certainty matters most. A market order prioritizes execution but can fill badly in a thin or fast market. A limit order controls price but may remain unfilled. Stop orders can support a risk plan but may trigger during brief volatility. Consider liquidity, size, fees, slippage, and the loss you can tolerate.
- Yes. A centralized exchange usually holds assets and matches orders in its internal database. A DEX may execute directly against an automated market maker, store orders on-chain, or settle off-chain signed instructions through a contract. DEX users face network fees, wallet approvals, transaction ordering, and failed-transaction risk, while centralized users depend more heavily on the venue's custody and records.