FWIW: I just spot checked my net deltas in corn, wheat, nat gas and silver in IB Risk Navigator and in QuikStrike. Those products are trading right now (overnight) and I believe both firms use Interactive Data/eSignal for their data feed. Four commodities, 12 contract months, about 50 unique strikes and they matched to two decimal points. I mention this not as a counter to Atticus' experience, because one year ago I would have said the same, and in fact, I didn't use Risk Navigator from about September to January because I didn't like it and didn't trust it. Lately, though, it seems to be OK for my needs. I don't have an opinion on the usefulness or accuracy of IB's VaR reports. I monitor them for trend, but as you probably know, there's a lot of debate in business, government and academia as to their value, whether someone should take "the number" and multiply it by 3x or 6x, etc. P.S. I suppose it's possible that the numbers from both firms are junk and I'm like Mr. Magoo in the markets.
I can already tell you now that the greeks IB provides are incorrect. They use spot as the input rather than forward which creates inconsistent vols, thus incorrect greeks.
TOS has excellent options tools, and they are free if you have an account. If you don't, you can open a paper account and get access to all tools, you will just need to re-sign up each 2 months.
This seems like a good place to re-ask about VaR in Interactive Brokers. Say you request an on-demand Historical VaR at 99.9% confidence with a horizon of one day does anyone know (or has gotten a response from IB to confirm): - that at least 1,000 days of market data has been used (as the confidence level implies) - that for futures, the historical data is really a spliced continuous future contract not the actual current contract alone. Without these being true, the report is just nonsense if you have futures or options on futures positions, whether or not you agree VaR is even useful to start with. I've asked IB directly but I don't expect a meaningful response, or at least not one very quickly.
And IB have still not replied after it took 3 ticket re-openings for them to even "understand" the question.