The detailed description is here.
In all methods of color setting the aA parameter is added, it has values from 0 to 255. 0 - transparent drawing, 255 - transparent. Default value is 255.
In the Stream.mq5 file (script) is given the example of drawing with transparency.
Translated from Russian by MetaQuotes Software Corp.
Original code: https://www.mql5.com/ru/code/1556
This indicator is calculated on the basis of currency pair volatility displaying the nearest support and resistance level depending on the trend direction.False Breakouts Counter
The indicator displays the number of false breakthroughs for the specified period