I've only had one problem like this happen to me aside from today. It was back in 2003 where I couldn't login at all. I had to call the branch and they placed the order for me to sell the stock. But by then I had already lost $1500 in profit. I couldn't really place a formal complaint since the broker said that it affected everyone. After that, I took out 80 of my money and put it into Ameritrade.

I still use Scottrade today but not for day trading.