Been reading through the manual and I can't comprehend this paragraph under System Variables/BarPeriod/remarks:

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Because bars start and end at day/hour boundaries, Friday daily bars end at Saturday 00:00 midnight when Weekend is at 1. The markets are closed at that time, therefore no trades can normally be entered after a Friday bar. For trading on Fridays, either don't use daily bars or set BarOffset accordingly so that the Friday bar ends earlier when the markets are still open.
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Does this mean by default no trading can take place on Fridays? And if so, what is BarOffset set to in order to enable Friday trading? Is Friday trading not recommended?

I'm not trying to do anything advanced, I'm just trying to plot a weekly graph using workshop4 and IndicatorTest.

thanks.