def refreshSymbol(command, mySymbols):
    """ Check if command is to refresh stock symbol (r | refresh [SYM/#]). """
    expression = command.strip().lower()
    words = expression.split()
    return (len(mySymbols) > 0 and ("r " in expression or "refresh " in expression) and (words[0] == "r" or words[0] == "refresh") and len(words) == 2)