Market Order vs Limit Order
A market order fills immediately at the best available price; a limit order fills only at your chosen price or better. One prioritizes certainty of execution, the other certainty of price.
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What it is
These are the two most fundamental order types, and choosing between them is a trade-off:
- Market order — 'fill me now, whatever the price.' Executes immediately at the best available price. Guarantees the trade happens; does not guarantee the price.
- Limit order — 'only at my price or better.' Guarantees the price; does not guarantee the trade happens.
| Market order | Limit order | |
|---|---|---|
| Fills | Right away, if anyone is trading | Only at your price or better, maybe never |
| Price | Not guaranteed (slippage) | Guaranteed or better |
| Best when | Speed matters more than a few cents | Price matters more than speed |
| Main risk | Poor fill in a thin or fast market | Missing the trade entirely |
How it works
The gap between them shows up in the bid-ask spread and in slippage — the difference between the price you expected and the price you got. In a large, liquid name the spread is tiny, so a market order fills essentially where you see it. In a thin or fast-moving name the spread widens, and a market order can fill noticeably worse than the last quote.
Worked example
A large-cap is quoted $100.00 bid / $100.06 ask. A market buy fills right away at about $100.06 — done, but you paid the ask. A limit buy at $100.00 waits for a seller to hit your price; you might save six cents a share, or you might not fill at all if the stock ticks up. Now imagine a thin name quoted $50.00 / $50.90 — a market order there could cost you nearly a dollar of slippage, which is exactly when a limit order earns its keep.
Why it matters
Order-type discipline is a small edge that compounds. Reflexively using market orders in illiquid names bleeds money to slippage; reflexively using far-away limits means missing good trades. The rule of thumb: market orders for urgency, limit orders for price control — and always widen your caution in thin, fast, or news-driven conditions where spreads blow out.
Because Entry Point Trading centers on large-cap US equities and major ETFs — the most liquid names — spreads are typically tight, giving you flexibility on both order types. Every signal shows its reasoning.
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