So, further to previous posts I have made in relation to my paper trading journey on IB, I am faced with yet another issue. When attempting to trade large-size options contracts, I am receiving a message informing me the order is rejected, as it is too large. Having used other paper trading platforms, I have never encountered this issue with other brokers. Why does IB impose such limits? I wonder does this only apply to simulated accounts, and it is not the case on live accounts? Between all of the 'regulatory' problems and such like, I am very unhappy that IB is my only venue to trade options here in Europe...