Leverage
Leverage is the ratio between traded notional value and account capital. It sets the margin required, not the risk taken — risk is set by position size together with stop distance. Run this calculation now: lot size and position size calculator
Leverage, margin and risk
At 1:100, trading one standard 100k lot requires 1,000 of margin. At 1:500 it requires 200. Leverage changed the capital locked, not the exposure: in both cases each point of movement is worth the same in your account.
Real risk comes from position size × distance to stop. High leverage merely allows a position too large for the capital — permission is not obligation, and confusing the two is the most common mistake when moving from a small account to a funded one.
Firm limits
Prop firms typically offer 1:10 to 1:100 depending on asset class, and many impose a lot cap per trade and a total simultaneous exposure cap. Exceeding that cap is a rule breach even with the account in profit.
Recording leverage and limits per account avoids the classic situation of applying one account's mental ruler to another. That is exactly what TCC's account registry stores.