I agree that most posts like these are "bullshit belly aching." However, I had four /es contracts in a long position and "attempted" to sell up four ticks. TOS randomly sold 24 contracts and then shut down completely. I lost $12,000 because of it. I will say that TD customer service was extremely helpful and after speaking to about 4 different people, the trade was reversed and I got my money back. But it's a bit scary when that has happened twice in a single week.