You've decided NIFTY will go up. Now you have to pick a strike, and that choice can make the difference between a winning and losing trade, even when your direction is right. ATM, ITM or OTM? Each behaves very differently.

This guide explains how ATM, ITM and OTM options behave, the trade-offs between them, and how to choose a strike using the OPIFY live option chain.

How each type behaves

ITM options: steadier, more expensive

ITM options move closely with the index because of their high delta. They cost more, but more of the premium is intrinsic value, so time decay hurts less as a percentage. They suit traders who want the option to behave more like the index.

ATM options: the balanced choice

ATM options react well to index moves, usually have the best liquidity and tightest spreads, and are the most common choice for intraday traders. Their downside is that they carry the most time value, so theta and IV changes affect them most.

OTM options: cheap, but often expire worthless

OTM options are tempting because they're cheap and can multiply in value on a big move. But they need a large, fast move to pay off, and most of them lose value or expire worthless.

How to choose: four questions

1. How big a move do you expect?

Small move: ITM or ATM. Large move: ATM or slightly OTM.

2. How fast?

If you expect the move later, avoid OTM because time decay will eat it. ITM is more forgiving.

3. How much time to expiry?

Near expiry, OTM options decay very fast. ATM options become very sensitive (high gamma).

4. Is the strike liquid?

Check volume, OI and the bid-ask spread. Wide spreads cost you on entry and exit.

Choosing a strike on OPIFY

1. Open the live option chain and select the index and expiry.
2. Use the Near ATM filter to see the strikes around spot.
3. Switch to the Greeks view to compare Delta, Theta and IV across ATM, ITM and OTM strikes.
4. Check volume, OI and bid/ask for liquidity.
5. Run your shortlisted strike through Quick Analysis to see its buildup and projected premium at your target.

Compare them in practice

The best way to understand the difference is to watch it. In the free options simulator, buy an ITM, an ATM and an OTM call at the same time and watch how each reacts as NIFTY moves and time passes.

Frequently asked questions

Which strike is best for intraday?

Many intraday traders prefer ATM or slightly ITM for their responsiveness and liquidity.

Why did my OTM option lose money when NIFTY moved my way?

The move may not have been big or fast enough to beat time decay, or IV may have fallen.

This article is for education only and is not investment advice. Options trading involves risk.