What is Market Order vs Limit Order?

Market orders prioritize speed of execution. When you place a market buy order, you receive shares at the lowest available ask price. This works well for highly liquid stocks where the spread is tight and the price impact is minimal. For large orders or illiquid stocks, market orders can result in significant slippage — the difference between the expected and actual execution price.

Limit orders prioritize price control. A buy limit order at $50 will only execute at $50 or lower; a sell limit at $60 will only execute at $60 or higher. The risk is that the order may never fill if the price doesn't reach your limit. Limit orders are essential for thinly traded stocks, volatile markets, and after-hours trading where spreads are wide.

Additional order types build on these fundamentals. Stop orders become market orders when a trigger price is reached. Stop-limit orders become limit orders at the trigger. Trailing stops adjust automatically as the price moves in your favor. Good-til-cancelled (GTC) orders remain active until filled or cancelled, while day orders expire at market close.

Professional traders almost exclusively use limit orders to control execution costs. Retail investors often default to market orders for convenience, which can be costly in fast-moving or illiquid markets. The general best practice is to use limit orders for nearly all trades, setting the limit at or slightly above the ask (for buys) to ensure execution while capping the price.