That is a benign error (happens only on a first run or when time frame or symbol is changed, and does not affect the result. Anyway, here is a version without that message : ehlers_fisher_transform.mq4
Agat added the nrp coloring to the version Mladen posted.
Thank you. A non-nrp version can be drawn from it?
Yes, if you change all the first 3 colors to the same color.
But then it will not just color. And I need a regular two-color indicator repaints
Agat, sorry not understanding what you are looking for.
mrtools can you please add arrows to this indicator when color changes?
Your version of the indicator on the chart leaves pieces of orange lines. So it should be?
It turns out that my MT4 does not store pictures. I can not show you.
F3...take snapshot of your desktop
Can be opened minute chart, wait a few minutes and everything will be seen