Liquidity is how easily you can buy or sell an option without moving the price — measured by tight spreads, high volume, and deep open interest. It’s crucial for scalping.

What liquid looks like

A liquid strike has a tight bid-ask spread (a penny or two on SPY), high volume (lots of trading), and deep open interest (many contracts, plenty of size on the book). You can get in and out instantly at a fair price. SPY near-the-money options are among the most liquid instruments in the world.

Why it matters

Liquidity determines your cost and your ability to exit. Illiquid strikes have wide spreads and few buyers — expensive to enter, hard to exit at a fair price (a trap when you need out). For a frequent scalper, trading liquid strikes is one of the biggest levers on total cost and safety.

Liquidity is your ability to get in and out cleanly. On an illiquid strike, the exit door is narrow — exactly when you most need it open.

The takeaway

Liquidity (tight spreads, high volume, deep open interest) means clean, cheap, safe fills. Favor liquid, near-the-money strikes; avoid thin far-OTM ones. NoVo routes to liquid strikes for exactly this reason — it’s foundational to good execution.