 				}
 			}
 			graphics.endFill();
-			
-			prevPoint.x = tempPoint.x;
-			prevPoint.y = tempPoint.y;
 		}
 		
 		// backwards compatibility

		public const colorNegative:LinkableNumber = registerLinkableChild(this, new LinkableNumber(0x800000));
		public const colorPositive:LinkableNumber = registerLinkableChild(this, new LinkableNumber(0x008000));
		
		// for line connecting demo
		public var connectTheDots:Boolean = false;
		private var prevPoint:Point;
		
		// delare dependency on statistics (for norm values)
		private const _sizeByStats:IColumnStatistics = registerLinkableChild(this, WeaveAPI.StatisticsCache.getColumnStatistics(sizeBy));
		public var hack_horizontalBackgroundLineStyle:Array;

				radius = defaultScreenRadius.value;
			}
			
			if (!isFinite(radius))
			{
				// handle undefined radius
