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Placing a buy or sell order sounds simple until your trade fills at a price quite different from what you saw on your screen. That gap usually comes down to which order type you chose, and whether you prioritised execution speed or price precision.
In this article, you will find a clear explanation of what market and limit orders do, how they behave across liquid versus illiquid stocks.
Key Takeaways
- Market orders prioritise speed, executing immediately at the best available price, while limit orders prioritise price, executing only at your specified price or better.
- Market orders carry a higher risk of slippage, where the final execution price can diverge from the quote seen right before placement, especially in thinly traded stocks.
- Limit orders are not guaranteed to be executed. If the market never touches your target price, the order remains pending or expires unfilled.
- Large market orders can result in partial fills across multiple price levels if the order book lacks sufficient depth at the top.
- Under SEBI norms, exchanges utilise built-in price protection ranges to prevent market orders from executing at erratic prices during sudden liquidity droughts.
What Is a Market Order?
A market order is an instruction to buy or sell a security immediately at the best available price in the market. It sacrifices price certainty to guarantee execution.
When it is used:
- Highly liquid, large-cap stocks where the bid-ask spread is narrow.
- Urgent entries or exits where speed outweighs minor price variations.
- Fast-moving, news-driven market events.
What Is a Limit Order?
A limit order is an instruction to buy or sell a stock only at or above a specified price. It sacrifices execution certainty to guarantee price control.
When it is used:
- Less-liquid mid-cap or small-cap stocks prone to price gaps.
- Situations requiring strict entry or exit target prices.
- Placing orders outside market hours or in advance of expected price moves.
Market Order vs Limit Order: Side-by-Side Comparison
| Feature | Market Order | Limit Order |
| Price Control | None, accepts prevailing market rates | Full, executes only at your price or better |
| Execution Certainty | High, provided market liquidity exists | Not guaranteed, may remain unfilled |
| Speed | Immediate | Conditional on market movement |
| Slippage Risk | Higher in illiquid counters | None; price is strictly capped or floored |
Example: Slippage on a Market Order vs a Limit Order
| Order type | Order details | What actually happens |
| Market order to buy 1,000 shares | No price specified | 400 shares fill at ₹500, 350 at ₹502, 250 at ₹505; average fill price = ₹501.95 |
| Limit order to buy 1,000 shares at ₹500 | Price capped at ₹500 | Only the 400 shares available at ₹500 fill; the remaining 600 shares stay pending or unfilled if the price moves away |
Read More About: Mid Cap Stocks
Other Related Order Types Worth Knowing
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Stop-Loss Limit (SL): Converts to a limit order once a trigger price is hit, ensuring execution only at that price or better.
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Stop-Loss Market (SL-M): Converts to a market order upon hitting the trigger price, prioritising execution certainty over price.
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Immediate or Cancel (IOC): Executes whatever quantity is immediately available and cancels any unfilled remainder.
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After Market Order (AMO): Permits order placement outside standard trading hours, queuing them for the next market session.
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Good Till Triggered (GTT): A conditional, broker-side feature that keeps an order dormant until a predefined price trigger is met, after which it routes a live order to the exchange. Valid for up to one year (or until manually cancelled/triggered), it eliminates daily order placement, making it well-suited for automating swing trade entries, multi-day stop-losses, and profit targets.
Read More About: Types Of Orders in Stock Market
Taxation on Trades Executed via Market or Limit Orders
The mechanism used to execute a trade has no bearing on tax liabilities. Taxation depends exclusively on the asset class and holding period.
Short-Term Capital Gains (STCG)
Listed equities held for 12 months or less are taxed at 20% flat under Section 111A.
Long-Term Capital Gains (LTCG)
Holdings held for more than 12 months are taxed at 12.5% under Section 112A, with an annual exemption limit of ₹1.25 lakh.
Intraday Trades
Same-day square-offs are treated as speculative business income and taxed at applicable income tax slab rates.
Conclusion
Market and limit orders solve distinct problems: one guarantees execution, while the other guarantees price. Aligning your order choice with stock liquidity and trading urgency helps eliminate costly execution surprises.
