Limit Order vs Market Order — Trading Wiki

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Published by TradeHQ. Site creator: Anuga Weerasinghe. This page has no recorded editorial review date; the About page explains the site's editorial approach.

What Limit Order vs Market Order means

Market orders seek prompt execution at available prices. Limit orders set a price boundary and may remain unfilled. Choosing an order type involves a trade-off between execution priority and price control.

In depth

A market order requests execution at available prices without setting a maximum buy or minimum sell price. A limit order sets that boundary, but may fill partly or not at all. A last-traded price is not a commitment that the same quantity is available now. For a hypothetical example, suppose the ask shows $20 for only five shares while a buyer wants ten. A market fill may reach higher offers. A $20 buy limit cannot execute above $20, but the unfilled quantity may remain open or expire according to its instructions. A stop-market instruction, by contrast, becomes a market order after its trigger and does not promise the trigger price.

Compare prices, completion, delays and modeled costs separately rather than assume an order type ensures better financial results. TradeHQ supports simplified virtual market orders only; it does not operate an exchange order book or pending orders.

Key points

• Market orders request execution at available prices; fills and price depend on liquidity
• Limit orders: exact price control, but may not fill
• Limit prices constrain execution price, without ensuring a fill or preventing loss

Why it matters when you are learning

Compare price control with execution uncertainty. A market order prioritises execution at available prices; a limit order sets a price boundary but may not fill. TradeHQ currently executes market practice orders only.

Worked exercise and its limits

Suppose a quoted ask is $10 but the next available fill is $10.20. A market purchase may fill at $10.20; a $10 buy limit cannot fill above its limit and may remain unfilled. TradeHQ supports market orders only.