"I placed an order to buy a stock at 200 dollars, but it filled at 202 dollars — what happened?"
That two-dollar gap is the difference between the two order types. The buyer used a market order ("buy now, whatever the price") when they meant a limit order ("buy only at $200 or less").
What a market order does
A market order executes immediately, at whatever the best available price is at that moment.
You control timing, not price.
In large, liquid stocks, the fill price is usually very close to what you saw on screen.
In thin or fast-moving stocks, the price can move between the moment you tap and the moment it fills — this gap is called slippage.
Best when getting in or out right now matters more than a few cents.
What a limit order does
A limit order executes only at your chosen price or better — at or below your price when buying, at or above it when selling.
You control price, not timing.
It may fill instantly, fill later, fill partially, or never fill at all.
It protects you from paying more, or selling for less, than you intended.
Best when you have a target price and can afford to wait.
Market order vs limit order, side by side
Market order | Limit order | |
|---|---|---|
What you set | Quantity only | Quantity and price |
What you control | Timing — fills now | Price — your level or better |
Will it fill? | Almost always | Only if the market reaches your price |
Main risk | Price slippage | May never execute |
Best for | Speed, in liquid stocks | Price control, in volatile stocks |
When to use each
Use a market order when:
You're trading a large, liquid stock or a broad ETF with a tight spread.
Getting filled matters more than a few cents of price.
You need to close a position quickly in a fast market.
Use a limit order when:
The stock is volatile, thinly traded, or has a wide bid-ask spread.
You have a specific entry or exit price in mind.
You're trading around earnings, news, or the market open and close.
A common rule of thumb: use a market order when speed is the priority, and a limit order when price is.
On StableStock, you can place both market and limit orders on real U.S. and Hong Kong stocks and ETFs, funded with stablecoins. Choosing the right order type is one of the simplest ways to control your trading costs.
Takeaway: A market order asks "how fast?" A limit order asks "what price?" Neither is better — they solve different problems. Use a market order when speed matters and the stock is liquid; use a limit order when price matters and you can afford to wait.
Next steps
Understanding your order status — Learn what happens after you place an order.
What is slippage? — Understand the hidden cost behind market orders.
