The Aronow Software LLC Wealth-Lab 4 Compatibility Library is a product which will allow the execution of most Wealth-Lab 4.x based scripts directly in Wealth-Lab 5.0 without script conversion or editing of any code. This will allow users to run existing scripts using the speed of Wealth-Lab 5.0 without having to convert the scripts to C#. http://aronowsoftware.com/WL4Compat.aspx The demo version provides full functionality but will only run with 500 bars or less. You will also see periodic reminders/nags that this is a demo version. The full version will not contain these limitations.