Obviously, there are some major differences between large institutional traders and the person who sits in a basement paying the mortgage with returns off the market. Is available information (speed, accuracy, quantity) one of these differences? In other words, with the current technology available, is the playing field level for both institutions as well as private investors? If real time action and information is no longer the largest difference, what is? Where do the big boys get their advantage? Other than a large staff of employees, what resources do trading institutions have that are not available to the home trader? I welcome all responses, especially those with professional experience in firms such as mentioned above.