So, the red key there I put next to a segment of red line. When it comes to these pennant continuation patterns, my understanding is that when they complete they go up by roughly the measurement of the left side (flat side) of the pennant. That segment of red line is the same length as the green arrow over on the right.
What I'm thinking is that the pattern might complete at some point along the horizontal green line above the pink arrow, and from there go up roughly as high as the length of the back of the previous pennant.