The three coins
The three-coin method is the way most people consult the I Ching today. For centuries, readers used yarrow stalks, a slower process. The coins are faster and simpler, which is why they became the standard. You do not need any special coins. Any three coins work, as long as you decide which side is heads and which is tails before you start.
If you want to know how to cast I Ching coins, the method is straightforward. You hold the three coins in your cupped hands, think of your question, and let them fall. You do this six times. Each throw gives you one line of the hexagram. The coins do not need to be old or lucky. Ordinary coins are fine, because the meaning comes from the numbers, not the metal.
The yarrow stalk method is older and more ceremonial, and few people use it today. The three coins give the same result in a fraction of the time. On this site, you do not even need to have coins with you. The server throws them for you, and you can focus on your question instead of the mechanics.
Heads 3, tails 2
Each throw of the three coins adds up to a number between 6 and 9. Heads count as 3, tails count as 2. So if you throw three heads, that is 3 plus 3 plus 3, which equals 9. Three tails is 2 plus 2 plus 2, which equals 6. Two heads and one tail is 3 plus 3 plus 2, which equals 8. One head and two tails is 3 plus 2 plus 2, which equals 7.
These four numbers are the only possible totals. You can never get a 5 or a 10. Each number stands for a different kind of line. The lines are the building blocks of the hexagram, the six-line figure that the I Ching uses to answer your question. Every throw gives you one line, and the number tells you what kind of line it is.
This system is simple but precise. It leaves nothing to guesswork. The coins do not decide the meaning. They just produce a number, and the number points to a line in the book. That is how the I Ching stays consistent, no matter who throws the coins.
The four line values
The four numbers correspond to four kinds of lines. A 7 is a young yang line, solid and stable. It stays as it is. An 8 is a young yin line, broken and stable. It also stays as it is. These are the quiet lines. They show the parts of your situation that are settled or steady.
A 6 is an old yin line. It is broken, but it is moving. That means it changes into its opposite, a solid line. A 9 is an old yang line. It is solid, but it is also moving, and it changes into a broken line. These are the moving lines. They show the parts of your situation that are in transition or about to shift.
When you have moving lines, your hexagram turns into a second one. The first hexagram shows your present situation. The second hexagram shows how things are heading, what the situation is becoming. The moving lines are the key to understanding the change. They are the reason the I Ching is called the Book of Changes.
The young lines, 7 and 8, stay put. They give the hexagram its shape and stability. The old lines, 6 and 9, are the ones that move. They are the active parts of the reading. If you get no moving lines, your hexagram stands alone. If you get one or more, the reading includes both hexagrams and the lines that are moving.
Six throws, bottom to top
You throw the coins six times to build the hexagram. The first throw gives you the bottom line. The second throw gives you the line above it, and so on up to the sixth throw, which gives you the top line. This order matters. The I Ching reads the hexagram from the bottom up, like a tree growing from its roots.
After six throws, you have a hexagram of six lines. If any of those lines are moving, you also have a second hexagram. You build the second hexagram by changing every moving line into its opposite. A moving broken line becomes solid, and a moving solid line becomes broken. The young lines stay the same.
The first hexagram is your starting point. The second hexagram is where the situation is tending. Together, they tell a story. The moving lines are the hinges, the points where change is happening. The I Ching has a text for each of those lines, and the second hexagram shows where the situation is heading.
Why we throw the coins on our server
On this site, the server throws the coins for you. You do not need to have coins with you, and you do not need to worry about throwing them wrong. It throws three coins six times, each landing heads or tails by chance. Heads count 3, tails count 2, and the result is a line of 6, 7, 8 or 9.
This keeps the reading fair. Nobody, not even the page, picks your lines. The server does not know your question. It just throws the coins and gives you the numbers. Your question is sent to the AI that writes Zhen's answer, and nobody chooses the lines you get.
The I Ching is for reflection and entertainment. It helps you look at a question from a new angle and does not decide for you. The coins are just a tool to get you started. By throwing them on the server, we make sure the process is clean, private, and free from interference. You can focus on what the reading means to you.
For reflection and entertainment.

