By analyzing a unique data set provided by the Taiwan Futures Exchange (TAIFEX), we find that the individual traders and futures dealers are positive feedback traders while foreign investors tend to engage in negative feedback trading (value buyer). The foreign investors and security dealers are good market timers in the Taiwan futures market and earn significant profits. The individual traders, in contrast, lose a significant amount of money in the futures market. The cumulative profit analysis shows during this study period that foreign investors earn about 600 million NTD and the individual trader loses about one billion NTD.