TWS option chain updates "impl bid vol" and "impl ask vol" slowly and incorrectly

See screenshot. The 7 put bid was 0.4, and I put in a big bid at 0.5, and the impl bid vol took a minute or two to change, and I still doubt it's correct because it only went from 97 to 102 while the ask is still 0.55 and its ivol went from 112 to 117.


Using the real time price feeds it'd be trivial for TWS to calculate its own ivols client-side in real time. Why doesn't it do that?

 

guessing that they don't dare change anything and also no incentive to fix it

 

IB sucks for data feed/speed. This doesn't surprise me.

 

It's even worse for short term options. I hope IB has plans to overhaul their TWS.

 

TWS is great the way it is except for a few little bugs like this.

 

I disagree. IV and Delta are the 2 big ones and they TOS does a better job on both of them, despite TOS not being one of the big Brokers

 

Most of the issues I have with TWS aren't actually TWS but more the data feed issues and how their servers feed TWS information. Lately for me charts taking forever to populate