PURPOSE: To analyze transaction information at real time and to display current transaction state and forecasting information so as to easily undestand them by receiving transaction information, automatically generating and displaying the pattern of variation in a transaction displaying an expressed image (e.g. one positive/negative line), a called name and forecasting information by referring to a dictionary previously registered correspondingly to the pattern of transaction variation.

CONSTITUTION: This trasaction information analyzer 11 is constituted of a transaction information receiving part 12 for receiving transaction information, a transaction information processing part 16 for calculating the pattern of transaction variable based upon the received transaction information and a pattern retrieving processing part 17 for collating plural transaction variation patterns, expressed images and called names corresponding to the patterns with the contents of a previously registered dictionary 1 and the pattern calculated by the processing part 16 with the contents of the dictionary 1 and extracting the exprssed image and called name of a coincident pattern.