private void CalcCurrentPrice(ISecurityRt rtSec, out double curQty, out double curPrice)
{
	curQty = 0;
	curPrice = 0;
	if (rtSec != null)
	{
		var orders = rtSec.Orders.OrderBy(ord => ord.Date);
		foreach (var order in orders)
		{
			if (order.IsExecuted)
			{
				int bs = (order.IsBuy ? 1 : -1);
				double qty = order.Quantity * bs;
				double price = order.Price;
				double newQty = curQty + qty;
				bool isGrowPos = Math.Abs(newQty) > Math.Abs(curQty);
				if (isGrowPos)
				{
					curPrice = newQty == 0 ? 0 : (curQty*curPrice + qty*price)/newQty;
				}
				curQty = newQty;
			}
		}
	}
	curPrice = curQty == 0 ? 0 : curPrice;
}