When backtesting if you have a FXT file in tester/history
i.e. GBPUSD1_0.fxt and GBPUSD5_0.fxt
How can you be sure it is used rather than another being generated?
How can you be sure it is not updated?
How can you be sure it is not overwritten?
Is there a way to start MT4 , via command prompt, so that you ensure these .FXT files are used and thus aim for 99.9% backtesting rating?