Не отрисовывается ADX

   
         
_area = new ChartArea();
_areaADX = new ChartArea();
Chart.Areas.Add(_area);
Chart.Areas.Add(_areaADX);
...

                _candlesElem = new ChartCandleElement();
                _tradeElement = new ChartTradeElement { BuyColor = Colors.Red, SellColor = Colors.Blue, IsLegend = true };
                _adxElem = new ChartIndicatorElement
                {
                    Color = Colors.Silver,
                    IsLegend = true,
                    Indicator = new AverageDirectionalIndex(new DirectionalIndex { Length = 10 }, new WilderMovingAverage { Length = 10 }),
                    Title = "ADX ({0})".Put(10),
                    StrokeThickness = 1,
                    IndicatorPainter = new AverageDirectionalIndexPainter(),
                };
                _area.Elements.Add(_tradeElement);
                _area.Elements.Add(_candlesElem);
                _areaADX.Elements.Add(_adxElem);
                candleManager.Processing += DrawCandle;
...
        private void DrawCandle(CandleSeries series, Candle candle)
        {
            if (candle.State == CandleStates.Finished)
            {
                var val = _adxElem.Indicator.Process(new CandleIndicatorValue(candle) { IsFinal = true});
                var adxValue = new ChartIndicatorValue(_adxElem.Indicator, val);
                //Debug.WriteLine(adxValue.Indicator.);
                this.GuiAsync(
                    () => Chart.ProcessValues(candle.OpenTime, new Dictionary<IChartElement, object>
                    {
                        {_candlesElem, candle},
                         {_adxElem, adxValue}
                    }));
            }
        }