The pivot point of the glyphs is done on the 0,0,0 coordinate of the glyph geometry and I’m afraid the glyph filter is not flexible enough to control that.
However the 3D glyphs representation let you specify a custom geometry, so you can create an arrow and transform it as you wish before using it as a glyph.
Here is the statefile for this:
midarrow.pvsm (721.3 KB)