Overview :
Quadrant Lines are a series of horizontal lines that divide the highest and lowest values (usually prices) into four equal sections.
Interpretation :
Quadrant Lines are primarily intended to aid in the visual inspection of price movements. They help you see the highest, lowest, and average price during a specified period.
Example :
An interesting technique is to display a Linear Regression trendline and Quadrant Lines. This combination displays the highest, lowest, and average price, as well as the average slope of the prices. I used this technique on the following chart of Black & Decker.





