Does the indicator repaint?
Yes, it must repaint as new price points appear in the chart.
Can I decide how many diagonals to display?
The amount of diagonals depend on the amount of price points you want to look back to the past, and the depth of the indicator iterating those price points to the future. Both can be controlled with input parameters.
How do I find reversal points?
Diagonals converge and criss cross each others in the future. Those are the key levels at which the market is more likely to react with a swing or a reversal in direction.
I want to see less lines!
Decrease the depth parameter and you'll see less lines.
I want to see more lines!
Increase the depth parameter to draw more diagonals.
I want to see even more lines!
Increase the Price Points and the Depth parameters of the indicator to see even more lines. This will look back more price points into the past, and make more connections into the future.