private void FillListboxes()
{
exchangeComboBox.Items.Clear();
exchangeComboBox.Items.AddRange(Exchanges.ToArray());
baseAssetComboBox.Items.Clear();
baseAssetComboBox.Items.AddRange(Assets.ToArray());
quoteAssetComboBox.Items.Clear();
quoteAssetComboBox.Items.AddRange(Assets.ToArray());
symbolComboBox.Items.Clear();
symbolComboBox.Items.AddRange(Symbols.ToArray());
periodComboBox.Items.Clear();
periodComboBox.Items.AddRange(Periods.ToArray());
}
