A daily loss limit caps how much a single session is allowed to cost you. Cross it and the account is closed or locked for the day, depending on the firm.
The part that catches people is not the cap itself. It is that your remaining limit shrinks as the session goes on, and the moment it is smaller than the distance to the stop on your chart, the rule has quietly become your real stop.
A worked example, step by step
Take an account with a $1,000 daily loss limit, measured against the balance the session opened with. Three trades, none of them unusual.
This example assumes the firm counts unrealised P&L in real time. That assumption is what makes the third row work the way it does, and the next section explains why firms that count only closed trades behave differently.
That third trade cannot lose $400. The account will be closed for the day at $250, while price is still $150 away from the stop you placed.
Nothing about the trade changed. The size is the same, the stop is in the same place, the idea is the same. What changed is that the rule now exits before the chart does, and the trade has been converted into something smaller than the one you thought you were taking.
The variant that decides everything: balance or equity
Some firms compare the limit against closed trades only. Others count unrealised loss on open positions in real time. This single difference changes what the rule is.
Counts closed trades
Only realised losses move you toward the limit. A position can go far against you and recover without ever touching it.
Counts unrealised loss too
Every tick against an open position counts while it is open. A trade that would have recovered can breach the limit on the way down.
Under a real-time equity version, an adverse excursion you would have sat through becomes a hard exit you never placed. You do not get the trade you designed; you get whichever comes first, your stop or the rule.
And this is where the measured range matters
We measured how far NQ actually travels inside a single candle. Half of all regular-session 5-minute NQ candles cover more than 28 points, and at the open the median is 52.25 points. The study, with method.
Put those two facts next to each other. If your remaining daily limit translates to fewer points than your intended stop, the firm’s rule can become the effective exit before your chart stop is reached. Comparing that distance with the measured 5-minute range gives useful market context, not a prediction of whether the limit will be hit.
That comparison is the useful version of this rule. Not "there is a daily limit", but: how many points of room does my remaining limit actually buy me, on this instrument, at this hour?
Four details to check in your own rules
- What is it measured against? Starting balance of the day, previous day's closing balance, or your highest equity during the session. The third is the strictest.
- Does unrealised loss count? Real-time equity checking is much tighter than closed-trade accounting.
- When does the day reset? Almost always the firm's server time, not yours. A position held across that boundary belongs to a day you did not think you were trading.
- What happens on breach? A lockout until tomorrow is survivable. Account closure is not. These are very different rules wearing the same name.
How it interacts with the drawdown rule
The daily limit and the total drawdown are two ceilings, and the one that binds is whichever is smaller right now.
An account with $2,000 of total drawdown left and a $1,000 daily limit gives you $1,000 today. An account with $600 of drawdown left and a $1,000 daily limit gives you $600, the daily figure is irrelevant because the other ceiling is lower. Under a trailing drawdown that shrinks after a profitable morning, which ceiling binds can change during the session. How trailing drawdown moves.
The $1,000 limit and the three trades are a worked illustration, not a measurement, and not a description of any firm's current terms. Limits, reset times, what counts toward them and the consequence of a breach all differ between firms and change over time.
Nothing here is advice about position size or stop placement. It explains a mechanism so you can apply it to your own contract, which is the only authority on your account. We are not affiliated with any proprietary trading firm.
Common questions
Does a daily loss limit close my account or just lock it?
Both exist. Many firms lock the account until the next session, which costs you the day. Others treat a breach as a failure and close the account. The consequence is one of the most important details in the rule and it is not implied by the name.
Does unrealised loss count toward the daily limit?
At some firms yes, at others no. Where it does, every tick against an open position counts while the position is open, so a trade that later recovers can still breach the limit on the way down.
When does the trading day reset?
At the firm's stated server time, which is often not midnight in your timezone. A position held across the reset is being measured against a new day's allowance, which is rarely what the trader intended.
Is the daily loss limit the same as the drawdown?
No. The daily limit caps one session. The drawdown caps the account overall. You can be comfortably inside one and breach the other, and the binding constraint is whichever has less room at that moment.
How should I size positions around it?
We do not answer that, deliberately. It depends on your remaining limit, your stop distance, the instrument, the hour and how many trades you intend to take. What we can say is that the calculation should use the room you have left today, not the size of the account.
How much can you actually lose today?
The article says two ceilings are open at once and the smaller one is the one that binds. Put your own account in and see which of them is holding you today, and what it leaves you.
What that room is worth in points
Dollars are only half the answer. The free check turns your room into points on the instrument you trade, next to the measured range of a candle, so you can see whether your stop fits inside what is left.
Risk & Drawdown Playbook
This tool answers today. The kit works the same arithmetic across your whole evaluation: both ceilings, every rule variant, your instrument and your stop, recalculated as you change them.