Why do I need a stripe under the buttons in the MoonBot terminal’s BackTest window?

The MoonBot terminal has a “BackTest” function – testing strategies based on historical trade data. On the main window of the MoonBot terminal, click on “Menu – BackTest” to open the “BackTest” window. If you click on the “Select file” button, then select the file.bin with the historical trade data and then click on the “Play” button, the process of playing this file will begin, the coin chart will open and the recorded trades will be drawn on it. The progress of the file playback can be observed on the strip under the buttons and the file name with the .bin extension.