private void ChartArea_ItemToolTipOpening(ItemToolTip2D tooltip, ItemToolTipEventArgs e) { TradeData tradeData = e.DataPoint.DataItem as TradeData; StockTooltipControl stockTooltip = new StockTooltipControl(); stockTooltip.ChangeNetPercent = 1 - (tradeData.Close / tradeData.Open); stockTooltip.Volume = tradeData.Volume; //The next three properties shows some fictional data to illustrate the idea stockTooltip.OneYearTargetEst = tradeData.Close * 1.1; stockTooltip.PERatio = 16.80; stockTooltip.ForwardingPE = 17.93; tooltip.Content = stockTooltip; }