Limit vs Market Orders: When to Use Which

There are only two main order types, but choosing wrong costs more over time than you would guess.

Market orders: certainty of execution A market order fills immediately at the best available price. It is fast and it always fills. The price: you likely pay the higher taker fee (see maker vs taker) and eat slippage on thin books (see understanding slippage).

Limit orders: price and cost A limit order fills only at your price or better. You control the price and usually get the lower maker fee; the cost is that it may not fill, or fills only partially.

A quick decision table • Chasing breakouts, triggered stops, arbitrage windows → market (certainty wins) • Resting bids/asks in a range, DCA, saving on fees → limit • Large orders → limit, scaled, to avoid eating through the book • Small coins / thin late-night books → almost always limit

Going further: post-only and iceberg The "Post Only" flag guarantees the maker rate; large orders can use iceberg orders to split size and reduce book impact.

Pair it with DCA When you dollar-cost average, resting a limit slightly below price tends to beat mindless market buys by a hair — and hairs compound.

Editor's take There is no "better," only "better for this order." Defaulting to limit and switching to market only when you need certainty is a cost win most people can claim today.