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

Better System Trader

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Generic Back Testing

When you organize it by net profit, then you can look at how each one of the parometers varies relative to the net profit. That will give you a pretty precise picture of the range of values you want to use in any walk forward testing. Even when you use genetic back testing, remember that you're looking over a given block of data,. You're looking at the average results over that block of data. But that's got its own set of problems, necessarily. What you're looking for is trying to get the most robust performance across that range of data.

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