URL: {{baseUrl}}/orders/calculate_loss
HEADERS: {"X-CSRFToken": returnCookieValue('csrftoken')}
BODY: {
    "previous_quantity": 2500,
    "transactions_buy": [
        {"quantity": 2000, "price": 26.54, "date" : "2015-04-23"},
        {"quantity": 1500, "price": 27.17, "date" : "2015-06-12"},
        {"quantity": 2500, "price": 25.03, "date" : "2015-04-22"},
        {"quantity": 1250, "price": 26.71, "date" : "2015-06-14"},
        {"quantity": 1250, "price": 24.89, "date" : "2015-07-17"}
    ],
    "transactions_sell": [
        {"quantity": 2500, "price": 31.31, "date" : "2015-05-15"},
        {"quantity": 750, "price": 29.19, "date" : "2015-05-16"},
        {"quantity": 1000, "price": 31.45, "date" : "2015-09-10"},
        {"quantity": 4000, "price": 28.19, "date" : "2015-10-13"}
    ]
}