I have this:

*ARROWSHIDDEN,- - - - > - - - - > - - - - > - - - -
A,1,-.5,1,-1,[">",ROMANS,S=1.0,R=0.0,X=-0.95237,Y=-.4285657],-.5,1,-.5,1,-.5
It requires a Text Style defined in the drawing called ROMANS which uses the ROMANS.shx font, without a fixed height.
Each dash is 1 drawing unit long at an effective linetype scale [the drawing's multiplied by the object's] of 1.
You can monkey with the relative sizes of the dashes [positive numbers] and gaps [negative], the number of them between arrows, etc., and use it as a basis for linetypes with other text [or shape] inclusions.
That Line is drawn from left to right. Use < instead to point the other way, or use a Rotation entry, and adjust the sizes of the gaps on either side of it to suit.
Kent Cooper, AIA