I have traded with them for years and had pretty good luck with their software in the past but NOT this year. When you type in a sell order with their streaming quotes if you do not execute soon after you type it in then the sell order can REFRESH and change to a BUY order which is their default. This has happened to me twice now in the last month. The first time I noticed it pretty quickly and actually made money. regardless, I called Scottrade to report the problem and was given the excuse nothing was wrong with their software and I had probably placed the order wrong. The tech person I spoke with was rude and insisted that their software was flawless or thousands of people would be calling to complain otherwise. I was frustrated but I understand that accidents happen and maybe I had placed the order wrong - and no harm was done. The same thing happened to me again last Friday and I am certain it was a sell order instead of a buy. As soon as I noticed that I had actually bought the stock when I typed in a sell order I immediately placed another sell order and the stock did sell the second time around but this time I lost money. The key, I believe, is the time you allow a sell order to set in the window before you trigger the sell of the stock. If you do make the mistake of trading with them, I would not recommend leaving a sell order up for more than 20 seconds before you execute the trade or you may in fact be BUYING MORE stock like what happened to me INSTEAD OF SELLING. I called them again today to make them aware of the problem and exactly how it was happening. The manager I spoke with was very polite but he just gave me an apology and said he would file a complaint. He agreed that the software could possibly refresh and default to a buy because that is their default but did nothing to compensate me for my loss. I have also had bad luck with their "gains keeper" which is about as inaccurate as can be. I have recently had bad luck with their order confirmations when placing any type of order. Everything from buying, selling, shorting, and covering short positions are often inaccurate and cancelation of orders are very hit or miss. This seems particularly off when shorting and covering short positions. I saw another poster here that has had that same problem and I truly feel for them because the mistakes can be very costly. I was a champion for them in the past but I would never recommend them in the future. If just one person is made aware of these problems and decides to trade elsewhere it is well worth my time writing this post. I'm moving to a different broker!!! Lesson Learned!! I would love to know if you have had problems and or positive things to say about their software.