a problem with Equidistant Channel in MT4

I have a very annoying problem with the Equidistant Channel in MT4. basically what I usually do is that I pick a completed bar on my chart, then I draw an Equidistant Channel using one of the extremes of the bar. so far so good. but if a few bars later I try to draw another Equidistant Channel using the very same extreme of the very same bar as before, a different channel sometimes appears. it is either wider or narrower than the older channel, very often the difference is quite significant in pips.

this really confuses me, and brings out the question, what is the underlyig mechanism for Equidistant Channels in MT4? the best guess I could make is that the Channels are calculated based on the latest average range values. but what is the exact algorithm? does anybody know? please shed some light ...

It's an issue with the indicator's drawing not matching the ever changing scale of the chart window. I had that very same problem until I put a piece of code in the indicator to simply output text telling me what the actual price was of each line of the channel I was looking at. Of course, this only works if you're using an indicator (1), and that you have the .mq4 file of the indicator so you can edit the written code (2).

Thank you, Mr Jedi! you are the knight in shining armor! would you please be so kind as to share this indicator of yours? if not possible, would you please point out where I might find such a .mq4 file as you've described above? thanks in advance!