Fill color RSI area

[bazsisomi]

Sorry if you have already discussed this topic (I searched but couldn't find it) or it's a very noob question.

I would like to color the area between 70 and 30 on the RSI graph for each stock.
I tried to color the RSI area between two horizontal lines with the following help (https://www.amibroker.com/kb/2007/03/17/how-to-fill-the-area-between-two-lines-with-a-solid-color/comment-page-1/) but this code didn't work for me even though I copied it. In addition, even though I draw a horizontal line the other stocks do not appear automatically. Could someone possibly help or help where I can find a solution to this?
Thanks for the answers!

[Tomasz]

Appropriate code is .... in the manual:
http://www.amibroker.com/guide/h_indbuilder2.html
scroll down to Gradient fill area charts

For example the code below paints area with RSI(14) above 70 with RED and area below 30 with GREEN

SetChartOptions( 0, 0, chartGrid30 | chartGrid70 );
SetGradientFill( colorRed /*top*/, colorGreen /*bottom*/, 50 /*baseline level*/, GetChartBkColor() /*baseline color */);
Plot( RSI( 14), "RSI", colorLightOrange, styleLine | styleGradient | styleClipMinMax, 30, 70, 0, -1  );