wojtek wrote:Right (maybe a unique label for each object would help ),
but OK, I think it's not worth coding, the final effect could
not be satisfactory...

wojtek

Unique label is a must (or else they will update the same object, but that is not what I was talking about). This is what I am talking about : two simple square objects overlapping on the same area (those are two objects, not 3 or more as it might seem)

Regardless of unique label, the way how metatrader draws objects they will always interfere with each other and in cases of even slightly more complicated interaction the result will be a complete mess