private void AddIndicator2Xml(XDocument xdChart, IIndicator indicator)
{
var xnIndicators = xdChart.Root.Element("Indicators");
if (xnIndicators == null)
{
xnIndicators = new XElement("Indicators");
xdChart.Root.Add(xnIndicators);
}
var xdIndic = indicator.Serialize();
if (xdIndic != null)
{
xnIndicators.Add(xdIndic.Root);
}
}