Select a symbol in the MarketWatch window or remove a symbol from the window.
[in] Financial instrument name. Required unnamed parameter.
[in] Switch. Optional unnamed parameter. If 'false', a symbol should be removed from the MarketWatch window. Otherwise, it should be selected in the MarketWatch window. A symbol cannot be removed if open charts with this symbol are currently present or positions are opened on it.
True if successful, otherwise – False.
The function is similar to SymbolSelect.