A trend line is a diagonal line between two or more price pivot points. They are commonly used to judge entry and exit investment timing when trading securities. A trend line is a bounding line for the price movement of a security. A support trend line is formed when a securities price decreases and then rebounds at a pivot point that aligns with at least two previous support pivot points. Similarly, a resistance trend line is formed when a securities price increases and then rebounds at a pivot point that aligns with at least two previous resistance pivot points.
Bet you've never seen portfolio analytics like these.