How to cast an I Ching hexagram: a beginner’s guide

Step 1: define one question

Use a question with a subject, a situation and a useful time horizon. “What should I consider about changing to this job in the next three months?” is clearer than “Will my life be good?” State relevant context without combining unrelated decisions into one cast.

For an ongoing situation, describe what has already happened. For a choice, identify the action being considered. For another person’s situation, state your relationship to them so the questioner and subject are not confused.

Step 2: cast three coins six times

Record the first throw as the bottom line, then build upward. Use one consistent convention for which coin face is assigned each value. The totals 6, 7, 8 and 9 identify old yin, young yang, young yin and old yang respectively.

With three fair, independent coins, the four totals occur in proportions 1:3:3:1. That is a property of the casting procedure, not an accuracy rate for interpretations.

The online tool offers casting and manual entry. If you use physical coins, enter the six results in the same bottom-to-top order. Both paths use the same chart-building rules.

Step 3: identify movement

The original six lines form the primary hexagram. Flip only old yin and old yang to obtain the resulting hexagram. If no lines move, there is no distinct changing hexagram.

The primary structure frames the current situation; movement adds a traditional way to discuss change. This does not mean the resulting hexagram is a photograph of an inevitable future.

Worked example: Guan changes to Pi

The Zuo Zhuan records a cast of Guan changing to Pi. To reconstruct the figures with coins for practice, read upward: young yin, young yin, young yin, old yin, young yang, young yang. Only the fourth line moves. Changing that broken line to solid turns the upper Wind trigram into Heaven while the lower Earth trigram stays the same.

The fourth line is also Guan’s Self line; its branch is Wei Earth. The corresponding changed line is Wu Fire, which generates Earth. In the Na Jia vocabulary this is returning generation. The original hexagram belongs to the Qian Metal palace, so the changed Fire line’s relationship is still measured against Metal. Reassigning it from Pi’s own palace would answer a different question.

The two tables below show the six throws and Guan’s branch assignments. The historical account supplies the pair of hexagrams; it is not evidence that the ancient cast used coins. Nor does this one configuration settle a modern person’s outcome without their actual question and casting date.

I Ching text reading and Six-line I Ching

I Ching divination is the wider family of practices using the sixty-four hexagrams. One approach reads the Judgment and line texts. Six-line I Ching, also called Liu Yao or Wen Wang Gua, assigns branches, elements and relationship categories and examines them with the casting month and day.

MingLiMR’s casting and reading follow the latter approach. Its library also includes the classical Chinese Judgment and Image with original English explanations, but those texts are not interchangeable with the Na Jia line method.

“Coin hexagram” describes a casting method; “Wen Wang Gua” often names the Six-line tradition. Mei Hua Yi Shu can derive a hexagram from time or numbers. Yarrow-stalk casting has its own procedure and probabilities. Producing one of the same sixty-four figures does not make all subsequent methods identical.

The standard yarrow procedure starts from fifty stalks, uses forty-nine, and performs three counting rounds per line: eighteen rounds for a complete hexagram. Time or number methods commonly select trigrams using remainders modulo eight and one moving line modulo six. Their interpretive conventions differ, and MingLiMR does not provide a separate Mei Hua Yi Shu chart.

Both methods make a moving line with probability one quarter, but they distribute old yin and old yang differently. These are procedure probabilities, not forecasts of how often a reading will come true.

Make the question answerable

For a relationship, “What should I consider about contacting this person during the next month?” identifies an action and a period; “Who is my destined partner?” leaves the subject and circumstances open. For work, distinguish staying in the current job from accepting one named offer. For waiting, name what you are waiting for and what has already been communicated.

One cast should not combine a relationship, an exam and an investment. If asking about someone else, explain whose situation it is. Clear context makes it possible to select the intended focus rather than forcing the same broad question into whichever relationship happens to appear.

Read the layers in a sensible order

Identify the primary and resulting hexagrams and mark every moving line. Locate Self and Other, then identify the question’s focus category. Check what is present and absent before interpreting the lines against the casting month and day.

The changing-lines guide explains why a changed line is read back against its own original moving line in the Na Jia method. A separate text-reading convention uses the number of moving lines to select classical passages.

Do not keep casting until you like the answer

Traditional texts caution against repeated questioning without a changed situation. Repeating a cast until a reassuring picture appears turns the procedure into selective sampling.

When conditions materially change—such as receiving a reply or making a new decision—you can formulate a new question about that new situation. Preserve the original context rather than retrospectively rewriting what the first question meant.

What can be checked

We can test the casting distribution, branch assignments, Self/Other locations and consistency of the chart output with the declared rules. Those tests establish calculation behavior. They do not establish predictive accuracy.

The published methodology does not provide a controlled Six-line I Ching prediction accuracy rate. Birth-reading experiments are not evidence for this different method. Chart creation is available without a birth date; any reading allowance or cost is shown in the product’s current result flow.