Over the specified bar range, plots a vertical line from open to close using the specified colors and line width (in pixels). In effect, these look like thinner/thicker candle bodies. The default candle bodies are made transparent over this range to make them appear hidden.
The indicator is capable of referencing the bar colors from another plot, using a technique of encapsulating the RGBT color value in a float value (plot to data window only recommended). Refer to example code (which is commented out) in the source code.