The Hsien Tien method uses a moment in time as the key to a Change. Because that moment stands between the past and the future of the course of the event, it uncovers it's root and it's result. The method can be used to divine into the moment of birth of an individual, and event, anything simultaneous or anything with an origin in time. It is especially useful for insight into any sudden or unexpected happening or an intense event of short duration. It can also be used to select a suitable time to initiate something by looking at moments in the future and selecting one with suitable enery. The hexagram changes every hour. Enjoy.