The present invention relates to a stock trading method using an automatic alarm sale method. The stock trading method enables a user to perform installment purchase along with the quantity and a predetermined purchase range when a purchase alarm is arranged to an alarm price by setting the purchase alarm at a specific price of an event; is configured to perform the installment purchase of holding quantity when a predetermined target is arranged to sale loss price in the rising or falling of a stock price with the ups and downs of the stock market after the installment purchase is complete; and provides user convenience by performing automatic sales along with the alarm price setting without individually selling the stocks by confirming a home trading means always.
