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185: How to avoid creating trading strategies that degrade quickly - Timothy Masters

Better System Trader

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Permutation Test

The common and frankly terrible way to answer this question is by testing our system on out-of-sample data. We can totally avoid that problem with a permutation test. The second permutation test is used for evaluating the performance of an existing model. It's going to be better than most or all of the trading system performances based on permuted data.

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