Simple vector returning ask

 Vector3 lastPosition;
 
 void Start()
 { 
 
  lastPosition = transform.position;
 
 }
 
 void Update()
 {
 
   FindDirection();
 
 }
 
 void FindDirection()
 {
 
   Vector3 _direction = (transform.position-lastPosition).normalized;
 
   if(lastPosition!=transform.position)
   {
 
     print(_direction);
 
   }
 
   lastPosition = transform.position;
 
 }

T$$anonymous$$s is for the case, when u don't know w$$anonymous$$ch axis it's moving on...... transform is the moving object's Transform. Try it out..