The week prior Thursday and Friday volume begins to decline in comparison to the volume on the Monday, Tuesday and Wednesday.
Yet, the volume on Thursday and Friday is higher or has more volatility in comparison to the following Monday (Today).
It's related to Key Economic Reports.
There were no reports today.
Tomorrow you will see an increase in volume and/or volatility due to key economic reports being released for the remainder of the week in comparison to today's price activity.