BSD
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That seems to say that if 9 trades lose 90 points, one trade must get those 90 points back , plus the gain for the week, which would have to be substantially more than the 90 points needed to breakeven, to make the whole thing worth while.
I get the impression that a lot is said in books that does not relate to real life. A trader who can only make a profit on 10% of his trades had better, seriously, consider getting a job, unless he is a George Soros.
With due respect to George Soros, who has proved his ability in trading, I would say that his book and his quotations were made after the sweat and tears that he suffered in making his fortune. I am willing to bet that he, a moneyless refugee from Eastern Europè, sweated blood and took severe risks in his attempts to get his fortune started. Most of us are not prepared to do that. If he was prepared to risk his future on 10% of his trades being correct it, certainly, puts him head and shoulders above the rest of us. That is why most of us get it wrong. We try to emulate brilliant traders and it is not possible to do so.
Hi Split,
good points as usual.
Think the dispersion across say your 100 trades was that you don't necessarily lose on 90 trades, but that depending on how you skew your expectancy via hit rate on one side, and average loss and take profit ratios on the other, you'll get lots of small wins, lots of small losses, lots of scratches, and then make the bulk of your net profits from the said 10 % of trades.
Sort of like the Paretos principle, just a bit worse.
Pareto principle - Wikipedia, the free encyclopedia
Quite interesting read btw if a bit dry, the book above about those hedge fund traders.