I know the logic of Ablesys ASCtrend-1 bars colouring. It's simple. Thera are 2 ways of the same idea:

1. Red bar when Williams' %R oscillator (which domain is [0, -100]) goes below -67% and blue bar when it goes over -33%.

2. 9-period channel (but i don't know which flavour of averaging was used originally) is built using highs for upper boundary and lows for lower. Red bar when close is below 1/3 of channel and blue bar when close is above 2/3 of channel.

As well I know that all that coloured dots in ASCtrend are displayed acording to something called NRTR, which I don't know what it is.

But I don't know and would like to ask if anybody knows

1. What is NRTR, what is logic (in human words or easylanguage, i don't know MQL/MQL4) of its calculation.

2. What is logic of BrainTrend price colouring behind the scene (please tell in the same manner as I've described ASCTrend, if you can).