solve repeated call for get_object

GET /portfolio/189/insights/
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

[
    {
        "day": "2021-02-09",
        "trades": 1,
        "pl_value_fees": 915.0
    },
    {
        "day": "2021-02-10",
        "trades": 1,
        "pl_value_fees": -674.0
    }
]