Willian D.Gann was born in 1878, and started working on the train at the age of 16. Later, he entered a cotton trading bank as a broker. At the age of 24, Gann bought and sold the first cotton futures contract and made a profit from it. In the following 53 years, he made a profit of $50 million from the financial market, equivalent to $654.38 billion now.

From 65438 to 0909, his trading skills began to attract attention. In 286 transactions, he was damaged only 22 times, with a success rate of 92.3%. In the late 1930s, Gann's interest shifted from stocks to commodities. Gann died at the age of 77.

Gann wrote a lot in his life, which benefited countless people, the most famous of which was Gann Wall Street for 45 years.