Limit order vs market order — what's the difference?
Quick Answer
A market order buys or sells immediately at whatever price the order book offers; a limit order only executes at your chosen price or better, but may never fill. One guarantees speed, the other guarantees price.
TL;DR
Market = guaranteed fill, uncertain price. Limit = guaranteed price, uncertain fill.
Key Takeaways
- 1Market orders pay taker fees and absorb slippage
- 2Limit orders often qualify for lower maker fees
- 3A limit order can sit unfilled if price never reaches it
- 4Most exchanges default to market orders on the simple buy screen
Full Explanation
A market order says 'fill me now at any price' — it sweeps the order book and executes instantly. A limit order says 'fill me only at this price or better' — it sits in the book waiting for the market to come to it, which may take seconds or may never happen.
The hidden economics favor limit orders twice: you avoid slippage entirely (your worst case is exactly the price you set), and on most exchanges resting limit orders pay the lower 'maker' fee while market orders pay the higher 'taker' fee — because makers add liquidity to the book while takers consume it.
Practical guidance for beginners: in a liquid market like BTC/USDT, set a limit order at or one tick below the current price — it usually fills within seconds and you've saved both slippage and fees. Reach for a market order only when immediate execution genuinely matters more than a few basis points. And note that exchange 'instant buy' screens place market-style orders with wide spreads — the standard trading view with limit orders is consistently cheaper.