When using these lists, some websites leave off certain companies for no apparent reason. Why do websites that offer updated lists during the day have slightly different companies appearing on these list for any given page refresh period? For instance a company with significant gains may be on one list, but left off another. Therefore, I have to look at about 5 different lists just to feel comfortable that I have an accurate list. Here are the sites I use: http://www.thelion.com/top_gainers.html http://finance.google.com/finance http://dynamic.nasdaq.com/aspx/mostactive.aspx?exchange=nasdaq&mostactive=adv#adv http://quotes.freerealtime.com/dl/frt/M?SA=Percent Gainers&IM=stats&stat=3 http://www.ameritrade.com/ Please comment or help. Its a pain to have use five different tabs to make sure I am buying/shorting the best possible money maker.