"The following are the warning signs of a possible online-trading addiction: Â· You're a thrill seeker and enjoy the challenge of trading as much as â and maybe even more than â making money. Â· You're a big risk-taker, willing to gamble large sums of money on a few stocks. Â· You invest heavily on margin and are probably overextended on other credit lines. Â· You have unrealistic expectations about a stock's prospects for increasing in value and the general direction of the market. Â· Family members and friends express concern about your trading. Â· You try to erase your losses by taking bigger risks." http://www.smartmoney.com/onthestreet/index.cfm?story=20010124 The last item is known as doubling up/ averaging losers. People that do that tend to have a gambling problem.