The game of MARGIN shows, as financial markets work. Basic idea - to teach an investor to accept financial decisions in market competition conditions, to understand motion of market and predict behavior of other participants. Most important - to learn to control the fear and ardour. There are very simple rules in MARGINGAME, but it is difficult to win. As a rule, the not luckiest and richest participants win, and those, who succeeded to think of own strategy and to realize her during a game. Test itself in MARGINGAME, take under control it fear and avidity, that break the most correct strategies even.