pivotlow

Detects pivot low (local trough) points in a data series

Name	Type	Description
`source`	field	Data series (commonly low)
`leftbars`	int	Bars before pivot that must be higher
`rightbars`	int	Bars after pivot that must be higher

pivotlow = source[rightbars] when it is below all leftbars preceding and rightbars following values, else NULL

// detect swing low with 2-bar confirmation
pivotlow(low, 2, 2) != null;

// swing low below 50 (support test)
x = pivotlow(low, 5, 5); x < 50;

// any detected swing low on close
pivotlow(close, 3, 3) != null;

field — may be NULL

leftbars and rightbars each must be 1-400, and their sum must not exceed 400

Most bars return NULL -- only a confirmed local trough yields a value