@type t() :: %Alpa.Models.PortfolioHistory{
  base_value: number() | nil,
  base_value_asof: String.t() | nil,
  equity: [number() | nil] | nil,
  profit_loss: [number() | nil] | nil,
  profit_loss_pct: [number() | nil] | nil,
  timeframe: String.t() | nil,
  timestamp: [integer()] | nil
}