solve repeated call for get_object

GET /portfolio/198/insights/
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

[
    {
        "day": "2020-11-09",
        "trades": 1,
        "pl_value_fees": 19.0
    },
    {
        "day": "2020-12-01",
        "trades": 1,
        "pl_value_fees": 31.0
    },
    {
        "day": "2020-12-23",
        "trades": 1,
        "pl_value_fees": -13.0
    },
    {
        "day": "2021-01-20",
        "trades": 1,
        "pl_value_fees": 239.0
    },
    {
        "day": "2021-01-25",
        "trades": 1,
        "pl_value_fees": 56.0
    },
    {
        "day": "2021-02-10",
        "trades": 1,
        "pl_value_fees": 265.0
    }
]