Strike Selection Basics

Choosing the right strike price is one of the most important decisions in any option trade — and one of the most overlooked by beginners.

ITM, ATM and OTM

• ITM (in-the-money): strike already favourable to the option; higher premium, behaves more like the underlying.
• ATM (at-the-money): strike near the current price; most sensitive to movement and time.
• OTM (out-of-the-money): strike away from price; cheaper, lower probability, popular with sellers.

The core trade-off

Every strike is a balance between premium and probability. Strikes closer to the price cost more (buyers) or pay more (sellers) but carry more risk. Strikes farther away are cheaper or safer but less likely to pay off.

Delta as a probability guide

Delta roughly approximates the chance an option finishes in-the-money. Sellers often target a 0.15 to 0.30 delta strike — far enough to have a good chance of expiring worthless, close enough to collect worthwhile premium.

Distance from spot

For sellers, distance from the current price is the safety dial. Closer strikes pay richer premium but can be breached quickly; farther strikes are safer but pay little. The right distance depends on volatility and your risk appetite.

Weekly vs monthly

Weekly options decay faster (more Theta) but carry sharper gamma risk near expiry. Monthly options are steadier but tie up capital longer. Matching expiry to your plan is part of good strike selection.

Strike and expiry selection is a full module in the Options Selling course, with delta-based examples.