def get_all_sell_orders(market_datas):
    """
    Get all sell orders from the returned market data
    :param market_datas: the market data dictionary
    :return: list of sell orders
    """
    sell_orders = []
    for _, market_data in market_datas.items():
        for order in market_data:
            if not order['is_buy_order']:
                sell_orders.append(order)
    return sell_orders