Ganna Previous High Low Oscillator - Amibroker AFL Code

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Change = 5;
GannIncrement = 0.0625;
procedure PlotShapeAt( x, y, shape, shift )
{
  PlotShapes( IIf( BarIndex() == x, shape, 0 ), colorRed, 0, y, shift );
}
procedure PlotBlueDot( x, y )
{
  PlotShapes( IIf( BarIndex() == x, shapeSmallCircle, 0 ),
              colorBlue, 0, y, 0  );
 
  for( i = -2; i <= 2; i++ )
  {
   if( i != 0 )
   {
      yGann = ( sqrt( y ) + i * GannIncrement ) ^ 2;
      PlotShapes( IIf( BarIndex() == x, shapeSmallCircle, 0 ),
                  colorOrange, 0, yGann, 0  );
   }
  }
}
bi = BarIndex();
sbi = SelectedValue( bi );
GraphXSpace = 2;
Plot( Zig( C, Change ), "Zigzag", colorGreen, styleThick );
Plot( C, "Price", IIf( bi > sbi, colorLightGrey, colorBlack ), styleBar );
upshift = 15;
if( SelectedValue( PeakBars( C, Change ) < TroughBars( C, Change ) ) )
{
   pt1 = PeakBars( C, Change, 1 ) == 0 ;
   pt2 = TroughBars( C, Change, 1 ) == 0 ;
}
else
{
   pt1 = TroughBars( C, Change, 1 ) == 0 ;
   pt2 = PeakBars( C, Change, 1 ) == 0 ;
   upshift = -upshift;
}
bpt1 = SelectedValue( ValueWhen( pt1, bi ) );
bpt2 = SelectedValue( ValueWhen( pt2, bi ) );
bpt3 = SelectedValue( ValueWhen( pt1, bi, 2 ) );
bpt4 = SelectedValue( ValueWhen( pt2, bi, 2 ) );
bpt5 = SelectedValue( ValueWhen( pt1, bi, 3 ) );
bpt6 = SelectedValue( ValueWhen( pt2, bi, 3 ) );
PlotShapeAt( bpt1, C, shapeDigit1, upshift );
PlotShapeAt( bpt2, C, shapeDigit2, -upshift  );
PlotShapeAt( bpt3, C, shapeDigit3, upshift );
PlotShapeAt( bpt4, C, shapeDigit4, -upshift );
PlotShapeAt( bpt5, C, shapeDigit5, upshift );
PlotShapeAt( bpt6, C, shapeDigit6, -upshift );
Level = SelectedValue( ValueWhen( pt1, C ) );
PlotBlueDot( round( bpt1 + 1.618 * ( bpt1 - bpt2 ) ), Level );
PlotBlueDot( round( bpt1 + 0.382 * ( bpt1 - bpt2 ) ), Level );
PlotBlueDot( round( bpt1 + 0.5 * ( bpt2 - bpt3 ) ), Level );
PlotBlueDot( round( bpt1 + 1.732 * ( bpt2 - bpt3 ) ), Level );
PlotBlueDot( round( bpt1 + 0.618 * ( bpt4 - bpt5 ) ), Level );
PlotBlueDot( round( bpt1 + 2 * ( bpt4 - bpt5 ) ), Level );
PlotBlueDot( round( bpt2 + 0.6707 * ( bpt4 - bpt2 ) ), Level );
PlotBlueDot( round( bpt2 + 2.618 * ( bpt4 - bpt2 ) ), Level );
PlotBlueDot( round( bpt2 + 1 * ( bpt6 - bpt2 ) ), Level );
PlotBlueDot( round( bpt2 + 3 * ( bpt6 - bpt2 ) ), Level );