how can i create a finger trail

Hey whats up guys how can i create a Trailrenderer based on my touch? kind of like fruit ninja when they drag their finger around it leaves a trail.

here is my code its kind of what im looking for but not exactly, the trail is dealyed i want it to snap to my position.

 using UnityEngine;
 using System.Collections;
 
     
     public class TouchMove : MonoBehaviour {
 
     public float smooth = 100;
 
     public float speed = 0.5f;
 
     // Use this for initialization
 
     void Start () {
     }
     // Update is called once per frame
 
     void Update () {
         if (Input.touchCount > 0) {
             // The screen has been touched so store the touch
             Touch touch = Input.GetTouch(0);
             if (touch.phase == TouchPhase.Stationary || touch.phase == TouchPhase.Moved) {
                 Vector2 touchPosition = Camera.main.ScreenToWorldPoint(new Vector3(touch.position.x, touch.position.y,10));
                 transform.position = Vector3.Lerp(transform.position, touchPosition, Time.deltaTime * smooth );
             }
         }
     }
 }