def generate_bar_chart(win_percentage):
    """
    Generate a string of emojis representing a bar (10 chars) that indicates wins vs. losses
    :param win_percentage: The percentage of wins
    :return: Example (55.0%-64.9%) '🏆🏆🏆🏆🏆🏆🔴🔴🔴🔴'
    """
    win_portion = round(win_percentage / 10)
    loss_portion = 10 - win_portion
    return "🏆" * win_portion + "🔴" * loss_portion