Drawdown calculator
Daily drawdown is how much you can still lose today before breaching the firm's rule. It is worked out from the day's base (opening balance or equity, whichever the contract names) minus the limit percentage. The calculator does that, and the overall limit too, whether it is static or trailing.
Enter starting balance, current balance, highest balance reached and your firm's limit percentages. The calculator returns how much can still be lost today and in total, in cash and in percentage, with no login and no sign-up.
To go deeper into each part of this calculation: Daily drawdown · Total drawdown · How trailing drawdown works
What this calculator solves
The trading platform shows balance and equity. What decides whether the account stays alive is something else: the distance to the day's loss floor and to the overall floor. That distance changes with every closed trade, changes again when equity makes a new high on a trailing account, and appears nowhere in the terminal.
Doing that arithmetic in your head mid-session is where most accounts die — not from lack of strategy, but from one number badly estimated in a hurry. The calculator exists to take that arithmetic out of the heat of the moment.
How the calculation works
Daily limit: day floor = day base × (1 − daily limit percentage). The day base is the starting-day balance or equity, depending on your firm's rule. Remaining daily loss is current equity minus that floor.
Static total limit: floor = starting balance × (1 − total limit percentage). On a 100,000 account at 10%, the floor is 90,000 and never moves.
Trailing total limit: floor = highest equity reached × (1 − percentage). If the account touched 106,000 with a 10% limit, the floor rose to 95,400. That is why the calculator asks for the highest balance: without it, the trailing figure comes out too generous, which is the dangerous direction to be wrong.
The headroom shown is always the smaller of the two distances — because the account ends at the first limit reached, not at the average of them.
Worked example
A 100,000 account, 5% daily limit on starting-day balance, 10% trailing total limit. The day started at 103,000 and the highest balance ever reached was 106,000. Equity now: 101,500.
Day floor: 103,000 × 0.95 = 97,850. Daily headroom: 101,500 − 97,850 = 3,650. Total floor: 106,000 × 0.90 = 95,400. Total headroom: 101,500 − 95,400 = 6,100. Real headroom is 3,650, the smaller of the two — and the practical trading ceiling, with the 70% safety margin we recommend, is 2,555.
Note the detail that misleads: the account is 1,500 in profit over its starting value and still has less room today than on day one, because the trailing floor rose with the high.
After the calculation
A calculator answers about one instant. What prevents a breach is seeing that number update with every result logged, across all accounts at once, with a warning before the limit. That is what TCC does with your registered accounts — including a phone alert when headroom falls below the level you set.