Quote from jimrockford:
I want to apologize to the OP for my being too quick to accuse him of lying. I accused him of lying, because I was angry about all the abuse I had taken for correctly diagnosing the trigger for his liquidation, and also because I couldn't believe a guy trading options at IB would honestly be as stupid as his presentation indicates. But on further consideration, I wonder if perhaps he honestly really is that stupid. If he honestly really is that stupid, then I owe him an apology.
You never correctly diagnosed anything.
You went on and on about naked puts in a cash account, and had to be told multiple times that you can't do american style spreads in a cash account.
Then finally back to square one with suspecting he had other positions. We were doing that since the start of the thread, genius.
There still isn't a clear explanation, the OP's story and IB's explanation don't go together completely yet. Atticus still has a point about the Canadian base currency not necessarily influencing the liquidation.
From my perspective, it's still too opaque to place the blame.