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@Drew_Brosenhaus, try also to generate RV chart of some straddle or calendar in ChartAffair RV Tool from Straddle/Calendar pages. See if this works. Be prepared to wait a minute or two while IB returns all historical data. Also, look at Log page in ChartAffair RV Tool. Log page displays all debug messages that TWS returns when code communicates with TWS via API. This may give some clues of what is wrong. Another idea, as @Christof+ said RV Tool gets yesterdays RV data directly from chartaffairs.com web site - maybe you have some kind of firewall which blocks connections to chartaffairs.com from excel and this makes tool stuck in the middle of the process?

Yep. That's correct. You need the following two subscriptions: 1. US Equity and Options Add-On Streaming Bundle 2. US Securities Snapshot and Futures Value Bundle NOTE: "US Securities Snapshot and Futures Value Bundle" fee is waived if monthly commissions reach 30 USD.