Why does a strat test in JF always produce a positive profit return when using cubic spline but when not using cubic spline, ie all the other options, the account always ends in negative equity or near 0?
Thus, how do we assess the validity of the tests? Is a test using cubic spline more valid, ie closer to reality than the others? Or is a test with cubic spline the least valid and the others are more valid? Or none of the test methods are valid, ie none reflect potential reality once the strat is live?
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