MarketPriceTrend(MarketPriceTrend)

{
    "category_id": "8de4c9fd-61a4-4c0b-bf88-0ed3a0fe3fa2",
    "category_name": "string",
    "period_start": "2019-08-24T14:15:22.123Z",
    "period_end": "2019-08-24T14:15:22.123Z",
    "avg_price": "string",
    "median_price": "string",
    "price_change_percentage": 0,
    "price_volatility": 0,
    "sample_size": 0
}