Define the scope→02
Inspect the source→03
Record the limits
Keep units consistent
A spread in pips, a commission per lot and an account fee in currency are different quantities. Write down each unit and the assumptions needed before combining them. Our spread measurement does not include an implied all-in trading cost.
Identify the commission schedule
Read the schedule for the exact account and instrument. Note whether the stated charge is per side or round trip and whether minimum charges apply. An account label does not establish the commission amount.
Review holding and conversion costs
Financing and currency conversion can depend on instrument, position direction and holding period. Check the dated account terms. Do not extrapolate one observation into a general forecast of future charges.
Separate payments from trading
Deposit, withdrawal and intermediary-bank fees belong in their own record. A withdrawal duration cannot establish that a transfer was free. Match the requested and received currency amounts to the applicable fee schedule.
Use a transparent scenario
If you calculate an example, publish the instrument, size, account, currency and time assumptions. Clearly distinguish an illustration from an actual trade. Our audit log contains observed tests, not hypothetical profit estimates.