COMBATPosition return before fees (%)
The slider below shows only leverage multiplied by price change. It deliberately excludes fees and liquidation. It is a concept illustration, not an account calculator; use the worked example to see how size and costs affect the balance.
Exposure comes from two controls
With 10,000 virtual USDT, a 10% order at 20× reserves the entry fee first. Margin = 10,000 ÷ 1.01 × 0.10 ≈ 990.10; entry notional ≈ 19,801.98. At price 1,000, quantity is about 19.80198. This example assumes one long, without additions or partial closes.
A close at 1,020 produces about 396.04 USDT gross profit. The engine charges 0.05% of notional at entry and exit: about 9.90 and 10.10 USDT. Net profit is about 376.04 and final balance 10,376.04. Displayed figures are rounded; calculation uses full precision.
Why 20× does not mean a 40% account gain
The 2% price rise yields 40% gross return on the position margin. After fees, the example account gain is approximately 3.7604% of the 10,000 USDT starting balance. Confusing position return with account return exaggerates what a trade achieved.
The slider below shows only leverage multiplied by price change. It deliberately excludes fees and liquidation. It is a concept illustration, not an account calculator; use the worked example to see how size and costs affect the balance.
Whole-balance collateral changes the loss boundary
New matches use remaining-balance collateral. Uncommitted balance can support an open position, so losing the chosen entry amount alone does not automatically close it. Large exposure can still exhaust the account. Older saved matches without the new rule retain their original collateral calculation.
Automatic stop-loss and take-profit settings are exit rules, not promises of a specific realised balance. Price gaps and the engine's execution rules matter. Inspect the actual close price and fees in the record instead of assuming that a chosen percentage is an account-wide loss limit.
Questions answered
Is all of my virtual balance at risk?
Under the remaining-balance rule, the account supports the open position. Size affects exposure, but does not create a separate protected account balance.
Is a 20% stop setting a 20% account-loss limit?
No. Position return and account return differ, and costs and execution affect the realised result.
Does a real exchange use exactly these rules?
No. This article explains CombatChart's game engine. Exchange maintenance margin, funding and execution rules can differ.