How to Be a Successful Trader

When you run a backtest over all the data that you've got and then look at the results, you're doing something that you couldn't have done had you been sent back in time to 1975. Even if on average they're all bad, some of them will look good for a given time period. This is just kind of the law of random numbers if you like. The lesson here is that we need to avoid looking at so many different rules but also reduce the number of variations or parameters as well.

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