@type t() :: %ExOanda.TradeReduce{
  base_financing: float() | nil,
  financing: float() | nil,
  financing_rate: float() | nil,
  guaranteed_execution_fee: float() | nil,
  half_spread_cost: float() | nil,
  price: float() | nil,
  quote_financing: float() | nil,
  quote_guaranteed_execution_fee: float() | nil,
  realized_pl: float() | nil,
  trade_id: String.t() | nil,
  units: integer() | nil
}