Bug 212370 [Regression] Negative value can not be shown both in chart builder and when preview [13]
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/PlotWith2DAxes.java
au.computeTotal( dValue );
							}
							iSeriesIndex++;
						}
						
						
						dAxisMax = Math.max( au.getPositiveTotal( ), dAxisMax );
						dAxisMin = Math.min( au.getNegativeTotal( ), dAxisMin );
						if ( ax.isPercent( ) )
						{
							double dAbsTotal = au.getPositiveTotal( )
									- au.getNegativeTotal( );
							if ( dAbsTotal != 0d )
							{
								dPercentMax = Math.max( ( au.getPositiveTotal( ) / dAbsTotal ) * 100d,
										dPercentMax );
								dPercentMin = Math.min( ( au.getNegativeTotal( ) / dAbsTotal ) * 100d,
										dPercentMin );
							}
						}
					}
				}
			}
			if ( ax.isPercent( ) ) 
			{
				if ( dPercentMax > 100 )
					dPercentMax = 100;
				if ( dPercentMin < -100 )
					dPercentMin = -100;
				if ( dPercentMax == 0 && dPercentMin == 0 )