PURPOSE: To support decision making for sales with comparatively high accuracy and to improve accuracy corresponding to use by comprising a device so as to judge intention to perform the sales of a security from the output of a neuro circuit network.

CONSTITUTION: This device comprises a data input part 10 which inputs data that becomes the base of security sales decision making and the neuro circuit network 20 which judges the security sales decision making, and a hierarchical network is used as the neuro circuit network 20. A price while a security market price is increasing is sampled as an ascending price at every ascent of constant price, and when it starts to descend, the price is sampled as a descending price at every descent of constant price. Such operation is repeated until the price arrives at the present market price, and obtained maximum value and minimum value of plural ascending prices are inputted to the plural input units of the neuro circuit network 20, and the intention of the security sales is judged from the output of the output unit of the neuro circuit network 20.