Modified RSI Multiple Overbought Oversold Zones - Amibroker AFL Code

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barvisible = Status("barvisible");
r = RSI( 14 );
maxr = LastValue( Highest( IIf( barvisible, r, 0 ) ) );
minr = LastValue( Lowest( IIf( barvisible, r, 100 ) ) );
ranr = maxr - minr;
Plot( r, "RSI(14)", colorRed );
Plot( maxr , "0%", colorGrey50 );
Plot( maxr - 0.236 * ranr, "-23.6%", colorPaleGreen );
Plot( maxr - 0.382 * ranr, "-38.2%", colorPaleBlue );
Plot( maxr - 0.50 * ranr, "-50.0%", colorOrange );
Plot( maxr - 0.618 * ranr, "-61.8%", colorPaleBlue );
Plot( minr , "-100%", colorGrey50 );
GraphXSpace = 3;