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A comment on A New Breed of Trader on Wall Street: Coders with a Ph.D. Parent comment

Re:A New Breed of Trader on Wall Street: Coders with a Ph.D by tomp on Tuesday February 23, 2016 @03:14AM (#11157349)
Haha, it doesn't work that way, unfortunately. If you have any strategy that's statistically different to zero, you have a winning strategy; if it's loosing money, you can just trade the opposite strategy yourself!

The problem is, that most strategies are zero, on average. You win some, lose some with your trades, but what eats your capital is the trading costs. Then even trading the opposite trade would still diminish your capital.

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Re:A New Breed of Trader on Wall Street: Coders with a Ph.D by EGreg on Tuesday February 23, 2016 @08:36AM (#11158702)
No, you don't know whether it will win or lose ahead of time. You just trade opposite strategies in an ambitious way so you are GUARANTEED to have a large chance of winning a lot ... the arbitrage is that one trader gets fired and the other gets a large bonus for being right!
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