Hi, I’m assuming that you want the angle relative to the direction in which the sphere trace was fired. In that scenario, you’ll need two vectors before finding the angle between them.
The first one along the trace path can be obtained by finding the Unit Direction vector from your “Trace Start” location to “Trace End” location. The second one can be calculated by finding the Unit Direction vector from the Hit “Location” (the center of the sphere the moment it hits a blocking object) to the Hit “Impact Point” (the actual contact point between the sphere and the blocking object). Once you have these vectors, its just a matter of finding the angle between them.