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152: "Backtesting trading strategies does not work" - John Ehlers

Better System Trader

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The Test of Ofa for Robustness

i saw on your web site you have a white paper, a, that you've published. It's called, what's the name of it? You begat ha, procedure to evaluate trading strategy. Ri ho, i just want to switch the topic now, actually, to robustness. I really love to start the very first line in the article is, back testing trading strategies does not work. What do you mean by that statement? Well, you've seen any number of strategies that are advertised. And for example, if you go to collective two, and you can see how the samples, how the strategies looked before they were released, and then after the release date, they fall

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