Let me know if there are other indicator scripts you would like to see me publish or if you want something custom done!
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.
The reason must be on the line 43 of the script. The phase must be in degrees. phase = i1 != 0 ? 180/pi * atan(q1 / i1) : 0
For me the best indication of a sure change in trend is when the FAMA line changes direction, up or down.
I like to fill the space between the lines of green when MAMA>FAMA and of red if not.