A marketable limit order is a limit order priced at or through the current market — so it fills immediately like a market order, but caps your worst price. It’s often the ideal order for a fast options scalp.

How it works

Instead of a market order (fill at any price) or a passive limit (may not fill), you set a limit at or slightly through the current ask (to buy) or bid (to sell). It fills right away against available liquidity — but your limit caps how far you’ll chase, protecting you from a wild fill if the market gaps in the instant your order arrives.

Why scalpers use it

It gives you the speed a scalp needs with a slippage ceiling a plain market order lacks — you get done, but never far worse than intended. On fast 0DTE it’s a sweet spot: you won’t miss the fill like a passive limit, and you won’t get a shocking price like a market order in a thin book.

A marketable limit is “fill me now, but not worse than X.” Speed and a safety net — which is exactly what a scalper wants.

The takeaway

Marketable limits balance certainty of fill and control of price — the practical default for fast, liquid options scalps. It’s the logic behind good execution: pursue a fair fill without missing the trade. NoVo’s adaptive routing applies this kind of thinking automatically.