Sometimes when you're selling options you want them to expire worthless and you don't always want to roll them into a new trade.
And, sometimes when buying calls, if the options expire before the run is done you might want to roll them so you can continue to profit from the run.
Managing " To Roll or Not to Roll"
In the OPTIONS tab you can choose to roll or not to roll.
Click the gear icon at the top right of the options back-testing editor. See the gear icon highlighted with a red box in the image above.
On - when Rolling Expirations is checked and you have an option that expires before a trade span ends, we'll roll it out for you. This rolls it out to the next expiration and across to the same strike price.
Off - when Rolling Expirations is un-checked we will let an option expire if it expires before a trade span ends.