def find_closest_smaller_value(find_value, list_of_values):
    """
    Returns the closest value from a list of values that is smaller than find_value
    :param find_value: The value we are searching for
    :param list_of_values: The list of values
    :return: The index of the closes value in the list. Returns -1 if not found.
    """
    for i in reversed(range(len(list_of_values) - 1)):
        if (list_of_values[i] < find_value):
            return i
    return -1