Looking at the 4 hour time frame, we have a larger, engulfing, Wolfe Wave. High probability move in play.
Point 5 hit on larger Wolfe Wave. Adding to position.
If 5'(5 prime) is hit we look at point 4 as the target.
If 5"(double prime) is hit we look at point 3 as the target.
The way you find 5' is by taking the 2-4 line and placing under point 3. 5" is found by placing the same line on point 1.
If price, for example, passes through 5' and doesn't quite hit 5" then the rule for 5' stays in place.