Why open interest by strike is not available?

If your Country is not available when you try to update your address, you will most likely need to open a new account with a different legal entity of Interactive Brokers.

You can start an account application by clicking on…

Open Interest data is available from the API by using the generic tick types 101 (for Option Open Interest) or 588 (for Futures).

Additional Information…

Some options, such as US Stock Options, do not trade outside of the regular trading session. Option volume is provided when the market is open…

In Mosaic click on New Window button and look for Open Interest By Strike. In Classic TWS click on Analytical tools menu and look for Open Interest By Strike. Click on the (Configure) gear icon on top-right to select mode Option Volume or Open Interest (might not be available for non-US underlyings) and chart Put&Calls or Put+Calls…