I’ve been having some issues over the last few days with back tests in demo not running when you click on ‘Probacktest my system’. The optimize report window appears and the progress bar window appears but the back test does not run and nothing is ever shown in the optimize report window. I have to click on ‘Stop’ to cancel the back test and then if the strategy coding window was closed any of the last changes get lost. The only way to get the strategy to run a back test is to close it down completely and then re-start it.