perheps the biggest trader of all times

Jesse Lauriston Livermore also known as the Boy Plunger, was an early 20th century stock trader. He was famed for making and losing several multi-million dollar fortunes and short selling during the stock market crashes in 1907 and 1929.
Born in Acton, Massachusetts, Jesse Livermore started his trading career at the age of fifteen. He ran away from home with his mother's blessing to escape a life of farming his father wished him to have. He then began his career by posting stock quotes at the Paine Webber brokerage in Boston.
While working, he would write down certain hunches he had about future market prices, which he would check for accuracy later. A friend convinced him to put his first actual money on the market by making a bet at a bucket shop, a type of gambling establishment that took bets on stock prices but did not actually buy or sell the stock.

By the age of fifteen, he had earned profits of over $1000 (which equates to about $20,000 today). In the next several years, he continued betting at the bucket shops. He was eventually banned from most bucket shops for winning too much money from them. He then moved to New York City and devoted his energies towards trading in legitimate markets. This change would lead him to devise a new set of rules to trade the marDuring his lifetime, Livermore gained and lost several multi-million dollar fortunes. Most notably, he was worth $3 million and $100 million after the 1907 and 1929 market crashes, respectively. He subsequently lost both fortunes. Apart from his success as a securities speculator, Livermore left traders a working philosophy for trading securities that emphasizes increasing the size of one's position as it goes in the right direction and cutting losses quickly.
.Livermore sometimes did not follow his own rules strictly. He claimed that his lack of adherence to his own rules was the main reason for his losses after making his 1907 and 1929 fortunes.
The popular book Reminiscences of a Stock Operator, by Edwin Lefevre, reflects many of those lessons. Livermore himself wrote a less widely read book, "How to trade in stocks; the Livermore formula for combining time element and price". It was published in 1940, the same year he committed suicide.
Livermore first became famous after the Panic of 1907, when he short sold the market as it crashed. He noticed conditions where a lack of capital existed to buy stock. Accordingly, he predicted that there would be a sharp drop in prices when many speculators were simultaneously forced to sell by margin calls and a lack of credit. With the lack of capital, there would be no buyers in sight to absorb the sold stock, further driving down prices. After the crash and its aftermath, he was worth $3 million.
He proceeded to lose 90% of that 1907 fortune on a blown cotton trade. He violated many of his key rules; he listened to another person's advice (he preferred working alone) and added to a losing position. He continued losing money in the flat markets from 1908-1912. He was $1 million in debt and declared bankruptcy. He proceeded to regain his fortune and repay his creditors during the World War I bull market and resulting downtrend.
He owned a series of mansions around the world, each fully staffed with servants, a fleet of limousines, and a steel-hulled yacht for trips to Europe. He married Dorothy, a beautiful Ziegfeld Follies showgirl when he was about 40 years old.
Livermore continued to make money in the bull markets of the 1920s. In 1929, he noticed market conditions similar to that of the 1907 market. He began shorting various stocks and adding to his positions and they kept declining in price. When just about everyone in the markets lost money in the Wall Street crash of 1929, Livermore was worth $100 million after his short-selling profits.