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# Requesting Option Chain

You can use "SecDefOptParams" tab to request Option Chain live market data.

Getting Option Chain live market data requires entering:

* Underlying Symbol
* Underlying SecType
* Underlying ConId
* Page Name
* Activate Page (TRUE / FALSE)

The images shown in the right-side show how to request IBM STK Option data and its output.

![DDE Option Chain](/docs/_fern-img/2e666389ad88babdb9d1605bed12f807102591f223f9a218a164d4a34d73b718.webp)

![DDE Option Chain Output](/docs/_fern-files/interactive-brokers-585439.docs.buildwithfern.com/e0f0edb524117c45e9aed6d93d1f89162bdb0c776d37b6f0951947c516f9c409/docs/assets/media/ddeOptionChainOutput-700x379.png)