Top-slice Vs average up

At what point do you stop averaging up and start top slicing. I know nothing is black and white but I’m trying to formulate a method in my head.

For example:

I see a stock at 30 I think it can go to 100, once it reaches 45 I’d probably add a small amount more when it hits 60 I’d add some more when it gets to the 80s I’d probably review and then Slice at 98 or something…