Almost every prop-firm account is governed by two loss limits that people routinely confuse: the maximum daily loss and the maximum overall loss. They are measured differently, they reset on different clocks, and mixing them up is one of the quickest ways to lose an account you were actually trading well.

Two limits, two clocks

The maximum daily loss is a short-term guardrail. It caps how much you can lose in a single trading day and then resets at the start of the next day. The maximum overall loss is the account-ending line: cross it and the account is closed for good, no reset. You can think of the daily limit as a circuit breaker and the overall limit as the floor.

Daily loss: the intraday guardrail

The daily loss is usually measured from your balance or equity at the start of the trading day, and it typically includes floating (unrealised) losses on open positions — not just closed trades. That last point catches people out: you do not have to close a trade to breach the daily limit. A deep enough unrealised drawdown at any moment can do it.

Maximum (overall) loss: the account-ending line

The overall loss limit is measured from the account’s starting balance (or, under a trailing model, from its high-water mark). Reaching it terminates the account. Because it does not reset, it is the number that ultimately defines your total room — and how that room behaves depends entirely on whether the drawdown is static or trailing.

Static vs trailing maximum drawdown

A static maximum drawdown is fixed to the initial balance. If you start at $100,000 with a 10% overall limit, the line sits at $90,000 and stays there whether you are up or down. A trailing maximum drawdown follows your account higher as it makes new highs, then typically locks once the account is up by the drawdown amount.

The trailing floor is far less forgiving early on: give back a few thousand dollars of open profit and you can be near your limit while still nominally in profit. Once it locks at the initial balance, it behaves like a static line from there.

The interaction that surprises people

The two limits are not additive and they do not protect you from each other. You can be a long way from your overall loss limit and still bust the daily limit in one bad session. Equally, a trailing overall limit can be ratcheting up beneath a run of winning days, quietly shrinking the room you think you have. Survival means respecting whichever line is closer at any given moment.

Sizing to survive both

Turn the limits into a trade budget. If your daily limit is 5% and you risk a fixed 1% per trade, five losing trades in a row reach the daily line — so your rules have to stop the day before a sixth. If your overall limit is 10% at the same 1% risk, ten independent losers is the theoretical floor, which is why professional sizing tends to sit well below the limit rather than at it.

How automated risk limits help

These limits are arithmetic, and arithmetic is where software has the advantage over a stressed human at the end of a losing session. RSForex Bot compiles per-trade, daily-loss and drawdown ceilings into the executor, so the position size and the day’s stop are enforced mechanically rather than by willpower. It cannot change the prop firm’s limits and it does not guarantee a challenge result — its job is to keep you inside the lines you were given.

Drawdown types, reset times and how floating P&L is counted are set by your prop firm and change over time. Confirm the exact rules of your own account before trading.