An alerting method which actively alerts the user if the trading he/she is making fulfills a predetermined trading strategy is disclosed. This method firstly determines an alerting condition of a security in a client device. The alerting condition is associated with a disciplined operating rule. The client device then accesses a historical trading record of the security, and calculates a prime cost of the security based on the record. When the user uses the client device to perform a trading of the security, and inputs a volume and a price of the security, and then, according to the alerting condition and the prime cost of the security, the client device determines whether or not the input volume and price fulfills the disciplined operating rule defined by the alerting condition, so as to display an alerting message on the client device based on the result of determination.
展开▼