[Request] Simple value addition of option chain custom column



New member
Hi all! could someone show me how to edit and add a custom column for options chain that displays:

Mark price of a vertical put spread + Mark price of the next vertical call spread?

For instance:
for SPX, 3220/3225 put spread mark price is 2.3, and 3225/3230 call spread mark price is 2.25; How to add a custom column that displays this 2.3+2.25 value = 4.55


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