I'm using the DDE link to Excel from the IB trader workstation. I'm trying to calculate all of my own options analytics in an excel sheet, but I do not know the syntax code for the following: 1) Days until Expiration. 2)Price of Underlying asset. The price of the Underlying asset can easily be dealt with by physically adding the underlying price of the stock or futures contract. I am really most concerned with the "Days until Expiration. Thanks.