name() :: String.t()

t() :: %ExFtx.Market{
  ask: number() | nil,
  base_currency: String.t() | nil,
  bid: number() | nil,
  change_1h: number(),
  change_24h: number(),
  change_bod: number(),
  enabled: boolean(),
  high_leverage_fee_exempt: boolean(),
  last: number() | nil,
  min_provide_size: number(),
  name: name(),
  post_only: boolean(),
  price: number(),
  price_increment: number(),
  quote_currency: String.t() | nil,
  quote_volume_24h: number(),
  restricted: boolean(),
  size_increment: number(),
  type: String.t(),
  underlying: String.t(),
  volume_usd_24h: number()
}