#[derive(Debug, thiserror::Error)]
pub enum Error {
#[error("failed to construct duration: {0}")]
PeriodOutOfBounds(String),
#[error("failed to run analytics")]
TradeExpired(String),
#[error("invalid market data: {0}")]
InvalidData(String),
}
pub type Result<T> = std::result::Result<T, Error>;