This has been a problem now for over a year now as I think Don mentioned & maybe he is correct in that the program is having a problem with data for stocks that have a decimal point in the Yahoo ticker. That never occurred to me. All I do know is that the program works fine if I download the data from Yahoo, save it as a file then get A.I. to use the file to backtest from. If it is the decimal point that is the problem I would have thought that Mark could sort that out fairly easily and get patch sorted out.
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