def _flat_bottom(close, low, open, high):
    """
    do we have a flat bottom
    :param close:
    :param low:
    :param open:
    :param high:
    :return:
        1 flat and green
       -1 flat and red
        0 not flat
    """
    if open == low:
        return 1
    elif close == low:
        return -1
    else:
        return 0