public void TickerSymbolChanged(string newTickerSymbol)
{
MarketHistoryCollection newHistoryCollection = marketHistoryService.GetPriceHistory(newTickerSymbol);
TickerSymbol = newTickerSymbol;
HistoryCollection = newHistoryCollection;
}
public void OnTickerSymbolSelected(string tickerSymbol)
{
MarketHistoryCollection historyCollection = _marketHistoryService.GetPriceHistory(tickerSymbol);
View.UpdateLineChart(historyCollection);
View.SetChartTitle(tickerSymbol);
}