DATA SOURCES
Four kinds of data, labelled separately
A report distinguishes actual ledger values, public fee schedules, modelled ranges, and items that are currently unavailable.
Actual ledger values
Aggregated locally in your browser from your own export: real commission, funding already settled, and the executed maker/taker split. This is the most reliable category because it describes events that already happened.
Public fee schedules
Binance and OKX USDT perpetual rates each carry a public source, an applicable tier, an effective date, and a last-verified timestamp. Schedules are versioned rather than overwritten, so any past conclusion can be traced to the version used.
Modelled ranges
When the export has no liquidity-role column, we do not guess a value. We publish an upper and lower bound and lower the confidence score. Ranges are always displayed separately from exact values.
Currently unavailable
The target venue's historical funding rates, historical slippage, and execution-quality differences cannot be verified from your source ledger. They are excluded from the verifiable difference and never substituted with current rates.