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Thanks! This is quote helpful. Margin rate is also less than 1/2 of HSI.

Thanks for the replies. The facts are open interest even though updated daily, can have 'update' later so when looking at the volume and OI changes, use your own judgement.

2nd case, RHT sep 60c, date, OI, volume 7/12, 5690, 3202 7/13, 7668,17 7/16, 4681,13 (monday, 3k reduction of volume 17?) 7/17, 7642/15 (??)

It's stated that open interest is updated at end of day after OCC clears all option traded and done with the match up of open and close orders. and I am fully aware of the relationship (or lack of) between volume and open interest. Still there're many cases where daily volume and open...

Can you guys from Asia share experiences of indeed there're delays/differences between IB's HK site vs the US main site? I am from Taiwan and ping to HK is <63ms, US is > 250ms!

I've tried IB a few times, yes a few times. Never like the TWS. After being with ToS for a couple of years, the latest (yesterday) incident is the last straw! Looking over the reviews and comments, I think IB is a better choice. I will still maintain ToS for charting and T/A, but use IB for...