Kagi charts were brought to the United States by Steven Nison when he published the book, Beyond Candlesticks. Kagi was created in the 1870s in Japan. Kagi charts display a series of connecting vertical lines where the thickness and direction of the lines are dependent on the price action. The charts ignore the passage of time.
The most popular trading technique for kagi charts is to buy when the kagi line changes from thin to thick and to sell when the kagi line changes from thick to thin.