def show_instruction(ticker):
    """
    Displays initial instruction based on ticker insertion

    :param ticker: the inserted ticker
    :return: dict setting visibility of instruction
    """
    if not ticker:
        return {
            'margin-top':'25%',
            'textAlign':'center',
            'color':'#9C9C9C',
            'display':'block'
        }
    return {
        'display':'none'
    }