I have a problem to connect to IB paper account, and searched previous post similar to the situation I have here:
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More precisely, the potential problem may be due to one of the followings:
(1) I failed to connect my IB's paper trading account from Hong Kong;
(2) I have both real and paper account on IB.
(3) I have a physical security card for real money account, which is only used to log in IB's account management, but not for TWS;
(4) I could launch a Quantopian algorithm to IB's real money account.
Since the previous post does not give any clear solution, I hope I could be touched by somebody. Thanks.