What is swing point, swing high and swing low.

Swing point plays an important role in technical analysis, it can be either swing high or swing low.
 
A swing high is where a bar's high is greater than the highs of at least one bar on both left and right side of it.

A swing low is where the low is less than the lows of at least one bar on both left and right side of it. 

For example, in the chart below both bar A and bar C are swing high, bar B and bar D are swing low. 




In some of my indicators, I used input Strength or Swing Length to define the minimum number of bars to the left and right side of the swing point.


If Strength set to 5, it means the swing high must be greater than the highs
of at least 5 bars to its left side and at least 5 bars to its right side. It can be more than 5 bars to each side of the swing point, but it cannot be less than 5.




If Strength set to 3, it means the swing low must be less than the lows
of at least 3 bars to its left side and at least 3 bars to its right side.