Bug 210635 Incorrect preview of chart after reverse categories.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWith2DAxes.java
for ( int j = 0; j < iTickCount - 1; j++ )
					{
						if ( aax.areAxesSwapped( ) )
						{
							
							if ( ( dY <= daTickCoordinates.getCoordinate( j ) && dY >= daTickCoordinates.getCoordinate( j + 1 ) )
									|| ( dY <= daTickCoordinates.getCoordinate( j + 1 ) && dY >= daTickCoordinates.getCoordinate( j ) ) )
							{
								
								dLength = daTickCoordinates.getCoordinate( j + 1 )
										- daTickCoordinates.getCoordinate( j );
								break;
							}
						}
						else
						{
							if ( ( dX <= daTickCoordinates.getCoordinate( j + 1 ) && dX >= daTickCoordinates.getCoordinate( j ) )
									|| ( dX <= daTickCoordinates.getCoordinate( j ) && dX >= daTickCoordinates.getCoordinate( j + 1 ) ) )
							{
								dLength = daTickCoordinates.getCoordinate( j + 1 )
										- daTickCoordinates.getCoordinate( j );
								break;
							}
						}
					}
				}
				Object percentileValue = null;
				if ( total != 0 )
				{
					if ( oDataOrthogonal instanceof Number )