yes, I am aware that I can trade more than I deposit on leverage 2:1 5:1 or even 10:1. But if Bitcoinica lets me withdraw more than I deposit , immediately after it gets confirmed, it has a bad business model because that's a free loan that never needs to be repaid.
I've used Bitcoinica before for leveraged trades but after 1 hour when the deposit was confirmed, it showed two confirmations and let me withdraw twice the amount.
At first I thought this was great since I have instant 100% profit, but if this happened to more than me, Zhou will come up short at some point.
I did not try another deposit.