End-point transform of a repainting indicator

Custom indicator/library in mql4. Only for experienced mql4 coders with very good knowledge of English, and possibly also C++ (for a dll).

I have a repainting indicator (based on some version of the zigzag indicator). It is not causal: this means that it repaints: the shape in the past sometimes changes as new bars arrive (= repainting). If you use the visual mode back-test in MT4 with an empty EA, and then you place a SMA(1) on this, you see how the shape was in "real time" and you can compare it to how it is incorrectly shown on the chart: Look at the image below: in the bottom panel, the blue line is the repainting indicator, and the red line is how the shape looked in real time.

What I need from my experienced coder is a piece of MT4-compatible software (library, custom indicator, ...) that can show me what the shape of the repainting indicator would have been in real time from the first time you drop it on the chart (the red line in my example). I can provide an example where this was done with another indicator with a dll (including C++ source code of the dll). My indicator, and the example indicator and example dll will be provided after you are selected as a coder. The indicator should only update 1x per bar, on the close of the bar.