I 'v used the EOD version for a lot of backtesting. I think it is very easy to lern to program. You can't test a system on many instruments to get at portfolio equity. The results from the backtest can't be exported for further analysis i Excel. But overall I think it is very good. Some brookers (CMC) use it so you can get real time data for free, but their data is not as good as PRT. I can't automat my trading that way.