private void SaveSymbolAsFavorite(object parameter)
        {
            //Create copy by serializing/deserializing
            SymbolAttributeSet.FavoriteId = Guid.NewGuid().ToString();
            var json = new JavaScriptSerializer().Serialize(SymbolAttributeSet);
            SymbolAttributeSet favoriteSet = new JavaScriptSerializer().Deserialize<SymbolAttributeSet>(json);

            //Add to favorites
            favoriteSet.GeneratePreviewSymbol();
            Favorites.Add(favoriteSet);

            //Serialize Favorites and save to file
            var favoritesJson = new JavaScriptSerializer().Serialize(Favorites);
            File.WriteAllText(_favoritesFilePath, favoritesJson);
        }