METHODOLOGY
Know what each number means.
Live account, market data, backtest and practice values remain distinct. Null means unavailable — never zero.
Live record boundaries
Public prices preserve provider source time and freshness. Private balances, positions, orders and fills appear only after actual provider synchronization. A missing or failed connection is never represented as a zero balance.
Performance boundaries
Performance requires supported fills, fees, valuations and external cash flows. Deposits are subtracted from period P&L, and incomplete cost basis or history produces N/A rather than an invented return.