This paper investigates the price impact of agent heterogeneity on market rational expectation from the technical analysis aspect by building an inter-temporal model under heterogeneous agent economy． It finds that the condition for stabilizing that market price is related to the sensitivity of the technical analysts to the ex post price，the ratio of the technical analysts in the market，and the value of risk-free interest rate． The analy-sis shows that the impact on price exists in the long run unless the analytic strategy holds a special condition．Furthermore，the high sensitivity may lead to market bubbles which are represented by the divergence of the price sequence． To control this type of bubbles，the interest rate should increase as much as possible．