In terms of swings,
When point 2 is above 1
3 is below 1, and price reverses from 4,
connecting 1 to 3 and extending - creates possible support line
connecting 1 to 4 and extending - creates possible target line.
Price bounces from support line (point 5) and tries to touch the target line.
We should start plotting only after point 4 is clearly evident.