By default the full historical data will be used for backtesting. If you want to limit the time span of backtesting data you can use the Data Horizon tool.
Minimum data bars - will always be set at 300 bars. Some indicators require at least so many bars to start drawing their line.
Maximum data bars – this value can vary between 300 and 200 000. This setting does not change the data files. The program will load the files' data and filter the bars using the settings below.
Start Date – Change this option to select date where the backtesting data should start. There must be a minimum of 300 bars between the Start and the End Date.
End Date – The of the used data period.