solve repeated call for get_object

GET /portfolio/171/insights/
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

[
    {
        "day": "2021-01-12",
        "trades": 1,
        "pl_value_fees": -0.0
    },
    {
        "day": "2021-01-13",
        "trades": 2,
        "pl_value_fees": 42.0
    },
    {
        "day": "2021-01-19",
        "trades": 2,
        "pl_value_fees": 74.0
    },
    {
        "day": "2021-01-24",
        "trades": 1,
        "pl_value_fees": 1.0
    }
]