What is Three-Coin Method?

The most common modern method for casting a hexagram. Three coins are tossed six times, building the hexagram from bottom to top. Each toss produces either a yin or yang line, with possible changing lines. This method was developed specifically for Liu Yao practice and captures the moving-line dynamics that structural analysis requires.

Source: Bushi Zhengzong (卜筮正宗), Wang Hongxu, 1709