I believe that using historic data has severe limitation for use in back testing. What happed in the past may not occur again. What is really needed is contrived data that runs an automated trading strategy though its paces so that the strategy's performance during different market conditions can more easily be determined. Ideally, this data should have user variable parameters, such as the strength of the trend, volitility, etc. Does anyone know of such a product or have any comments? Norm
I do recall that somebody offers synthetic data for sale but unfortunately it was years back and I have no clue who it was. I just googled on "synthetic stock data" and got not much. Maybe it was Mark Jurik at Jurik research?