Hi Yuri,
Thanks for sharing the Price Channel indicator.
I tried different settings and found 21 quite interesting.
I saw Mr Tools' upgrade which is cool, but it didn't quite hit my requirements so I've had a go at making some mods to your original.
I have added mid band colour change, alerts and on/off button. Sorry, no mtf or arrows.
I'm very much a novice coder. These mods all seem to work, although it's the first time I've got the colour change to work. I've compared it to both yours and Mr Tools versions and they completely align. Phew!