Prop Firm Intraday Drawdown Explained: Real-Time MLL

Intraday trailing drawdown is a maximum loss limit that updates the high-water mark in real time during the session, not just at session close. Every tick of new equity high moves the floor up immediately, including on an unrealized wick from a single fast candle. The mechanic is the harshest variant of trailing drawdown and accounts for a disproportionate share of evaluation breaches at firms that still use it.

This is the variant that kills the most accounts on what feel like unfair technicalities. A trader who watches the account move to a peak then immediately pull back can find the new floor has been set by a price they never actually banked. Understanding the precise mechanic, identifying which firms use it on which products, and building a position-management approach that respects the variant are the three goals of this guide.

The core definition

Intraday trailing means the high-water mark used for the drawdown calculation updates continuously during the session, on every new peak balance the account reaches, regardless of whether positions are open or closed. The floor under the account follows this high-water mark with a fixed dollar offset (the trail amount), and the floor never moves downward. Once a new high is touched, the floor advances to match.

Unrealized versus realized peaks

On most intraday-trailing firms, the peak balance includes unrealized profit on open positions. A position that runs to a momentary high then reverses still locks the floor higher based on that fleeting peak. This is the central pain point of the mechanic. The realized profit-and-loss at session close may be far smaller than the floor advance suggests, leaving the trader with reduced buffer for the following session despite a flat or modestly positive day.

Tick-by-tick versus snapshot variants

Some firms calculate the high water on every market tick (true intraday), while others use a one-second, thirty-second, or one-minute snapshot. The snapshot variants smooth out the worst single-tick wicks but still capture intra-session peaks that EOD trailing would miss. The exact granularity is firm-specific and rarely advertised; verify with support if it matters for your strategy.

Intraday versus end-of-day trailing

End-of-day trailing uses only the session-close balance to update the high-water mark. Wicks and intra-session spikes are ignored. The difference for a wide-stop or scale-in trader is enormous, and the variant choice often matters more than the trail amount itself.

Why intraday trailing kills accounts on wicks

A trader holds a long ES futures position that briefly spikes $1,200 in unrealized profit on a runaway candle, then reverses to close the day flat. Under intraday trailing, the new high-water mark is set at the $1,200 peak. The floor moves up by $1,200, even though no profit was actually banked. If the next day produces a normal $500 drawdown, the account may now breach because the buffer above the floor has been compressed by the unrealized peak from the prior session.

The mechanic punishes a behavior that experienced traders consider perfectly normal: holding a position through a brief spike and exiting when conditions resolve. On a personal account the spike is irrelevant if you do not bank it. On an intraday-trailing prop account, the spike is permanent because the floor has already moved. This is the single most counterintuitive aspect of the mechanic for traders coming from a personal-account background.

Firms historically using intraday trailing

The intraday variant was more common on early futures prop firms but has shifted toward EOD on most modern products under trader pressure. The list of firms still using it has shrunk significantly between 2023 and 2026.

The math: a $100K account under intraday trailing

Trail $3,000. Starting balance $100,000. Initial floor $97,000. Trader holds a long position that spikes to $103,500 unrealized then closes the day at $101,200. The intra-session peak of $103,500 sets the new high water; the floor moves to $100,500.

Note: the account closes at $101,200 but the floor has moved to $100,500. The buffer is now only $700, even though the trader closed up $1,200 for the day. Under EOD trailing the same scenario would have set the floor at $98,200 because only the close matters. The buffer at close would have been $3,000 under EOD versus $700 under intraday, a four-to-one difference on identical trading.

Same scenario under EOD trailing for comparison

Buffer at close: $3,000 under EOD trailing versus $700 under intraday trailing. Same trader, same session, same closing balance, but the available risk room going into tomorrow is over four times larger under EOD. This is why the variant choice matters more than almost any other rule comparison when picking a firm.

Strategies that fail under intraday trailing

• Scale-in with wide entry bands that briefly run far in your favor then partially reverse
• Holding through volatile news releases that spike then settle
• Trailing-stop strategies that take partial profits at low levels and let the rest run far
• Letting winners run past your normal target to chase outsized days
• Holding overnight on futures with morning gap risk (unrealized gap counts as a peak)
• Algorithmic strategies that target large unrealized swings before reversal exit

Strategies that work under intraday trailing

• Tight stops with disciplined exits at predefined levels
• Stop-and-reverse setups that bank profit before letting the next move develop
• Daily targets that close all positions before any intra-day reversal can occur
• Smaller size with shorter holds to reduce wick-risk exposure
• Avoiding news entries entirely on accounts with intraday trailing
• Mechanical scalp setups with one-to-two tick targets and tight stops

Rule-of-thumb buffer above MLL on intraday firms

Add at least one full trail amount to your normal stop placement. On a $3,000 trail, never let cumulative unrealized profit-to-floor distance fall below $3,000. The buffer protects against a single normal pullback after a wick. This is more conservative than the half-trail buffer recommended for EOD trailing because the intraday variant produces sudden floor advances that EOD does not.

Common questions about which firms still use intraday

The market has shifted strongly toward EOD trailing since 2023. Most current futures firms use EOD trailing on funded products. Intraday trailing persists mostly on evaluation phases at specific firms or on legacy account types. Always verify the current rulebook before purchasing because firms update their variants without prominent announcements.

Intraday trailing on forex products

Forex prop firms more often use static drawdown on the eval side and a trailing drawdown only after the funded phase begins. The intraday-versus-EOD distinction is less commonly emphasized in forex because trail amounts are calculated against account size and forex wicks rarely produce the same unrealized peak distance as a futures spike on a single contract.

Why some firms maintain intraday trailing

The intraday variant filters for traders with tighter execution discipline and faster exit decisions. Firms that target experienced traders sometimes keep intraday trailing on a premium SKU as a brand signal. The pass rate is lower but the funded cohort is more conservative on average, which improves payout-cohort stability for the firm and reduces tail risk on outsized monthly payouts.

How to verify your firm's variant

Read the official rulebook, not third-party summaries. The exact phrase to look for is 'high-water mark updates in real time' or 'on every new peak balance'. If the rule says 'end of day' or 'at session close', the firm uses EOD trailing. The variant is usually buried several scrolls into the rulebook rather than highlighted in marketing.

• Find the official rulebook page on the firm's site
• Search the rulebook for 'high-water', 'peak balance', or 'real-time'
• If unclear, open a support ticket and ask explicitly: intraday or EOD?
• Cross-reference Reddit threads from current funded traders
• Test on a small account first to verify behavior matches stated rules

Comparison table across all four drawdown mechanics

Risk-management mental model

Under intraday trailing, treat every tick of unrealized profit as already locked in by the firm. The risk model is: assume the firm has already taken your peak unrealized profit even if you reverse the position. Manage the trade as though you are holding the post-peak position with a tighter implicit stop. This mental shift is the most important adjustment for traders new to the variant.

Real-world example: a trader who blew an account on a wick

Documented Reddit case: a Topstep $150K account ran to $156,000 unrealized profit on an ES rally, then the trader held through a reversal back to $151,800. The intraday high-water mark moved the floor to $151,000. The next session's normal $1,200 pullback breached the floor at $149,800. The trader closed up $1,800 cumulative across two sessions but lost the account.

The lesson is structural: under intraday trailing, banking profits at the peak is the only way to convert unrealized highs into permanent floor advance. Holding through a reversal locks the worst of both worlds: floor advance from the peak, balance pullback from the reversal. The mechanic is unforgiving of any strategy that relies on holding through transient excursions.

How to migrate from intraday to EOD trailing firms

Traders who repeatedly fail on intraday-variant accounts should consider switching to EOD-trailing firms even at slightly higher evaluation costs. The behavioral cost of intraday trailing for many strategies exceeds the dollar savings on cheaper evaluations. MyFundedFutures Pro, Alpha Futures, and Bulenox EOD-trail products are common destinations for traders making this switch.

The transition usually takes one or two evaluations to internalize the new mechanic. Strategies that were marginal under intraday often pass comfortably under EOD because the strategy itself was fine; only the variant was incompatible. Verifying the variant before purchase is more important than comparing headline prices or profit targets across firms.

Position size management under intraday trailing

Under intraday trailing, position size has an outsized impact on floor advance. A two-contract ES position can spike a thousand dollars in unrealized profit on a normal candle, locking the floor up by that amount. A one-contract position spikes only five hundred dollars in the same move. The smaller size produces a smaller floor advance per session, leaving more buffer for the next day.

The right-sized position is the size at which a normal positive excursion does not produce a meaningful floor advance. For most ES traders on a one-hundred-thousand-dollar account, this is one or two contracts maximum. Sizing up beyond this point accelerates floor advance faster than it accelerates banked profit, which is the structural cost of size under the intraday variant.

Daily P&L management

Set a daily target equal to one to two percent of account balance and stop trading when the target is hit. On an intraday-trailing account, continuing past the daily target creates additional floor-advance risk without proportional reward. The discipline of stopping at the target is more important on intraday accounts than on EOD accounts because the cost of overshooting is permanent floor advance rather than transient pullback.

Many traders run a hard rule on intraday-variant accounts: no trading after the first new equity high of the session. The rule banks the floor advance from the morning move and protects against the afternoon round-trip that would lock the floor higher without producing net profit. The rule is mechanical and removes the discretionary judgment that traders typically get wrong on tight-buffer days.

Comparing pass rates across variants

Pass rates are typically two to five percentage points lower on intraday-variant evaluations versus EOD-variant evaluations at the same firm. The difference is consistent across multiple firm pass-rate disclosures. Earn2Trade publishes eight point eight nine percent pass on their EOD variant; equivalent intraday-variant evaluations at peer firms cluster around five to seven percent.

The lower pass rate is a direct consequence of the harsher mechanic. Traders who would have passed an EOD evaluation with their normal style fail an intraday evaluation because their normal style includes patterns (wide stops, holding through brief reversals) that the intraday variant penalises. The same trader on the same strategy passes one and fails the other.

Algorithmic trading under intraday trailing

Automated strategies running on intraday-variant accounts need explicit logic to manage the high-water mark. Strategies that target large unrealized swings before reversal exit are particularly fragile; the algo bank a small portion of the swing but the floor advance reflects the full peak. Add a hard rule that closes positions when unrealized profit exceeds a defined fraction of the trail amount to protect the floor buffer.

Backtest results from personal-account simulators often dramatically overstate the equity curve a strategy will produce on an intraday-trailing prop account. The simulator uses closed-trade P&L, but the prop account tracks unrealized peaks. Re-running the backtest with high-water-mark tracking is the only honest way to estimate prop-account performance before purchasing the evaluation.

Final notes on trading intraday drawdown firms

Intraday trailing rewards tight execution and punishes letting winners run beyond a planned exit. Traders accustomed to scale-out approaches often find the variant too constraining. EOD-trailing or EOD-locked products are usually a better fit unless the trader has explicitly trained for the intraday variant.

If you are unsure which variant your account uses, assume intraday and trade accordingly. The cost of treating an EOD account as intraday is lost upside. The cost of treating an intraday account as EOD is a breached account. The asymmetry favors the conservative assumption every time.

For experienced traders considering an intraday-variant evaluation specifically (often at a price discount versus equivalent EOD products), the math can work but requires explicit adjustment of execution rules: tighter targets, smaller position sizes, mechanical stops, and no exceptions on news or volatility expansion days. The price savings versus the EOD equivalent is typically twenty to forty percent at firms offering both variants.

Frequently Asked Questions

What is intraday drawdown in prop trading?

Intraday drawdown is a maximum loss limit that updates the account high-water mark in real time during the session, on every new peak balance reached, including unrealized profit on open positions. The floor moves up immediately, not at session close.

How is intraday trailing different from EOD trailing?

EOD trailing only uses the session-close balance to update the high-water mark. Intraday trailing uses every momentary peak including wicks. The same trade can produce very different floor positions under the two variants, sometimes a four-to-one difference in available buffer.

Which firms use intraday trailing drawdown?

Apex applies it pre-funded before the lock threshold. Topstep used it on legacy Trading Combine products. Some FundedNext Stellar Rapid plans apply it. Most firms have shifted toward EOD trailing since 2023, but the variant still appears on specific SKUs at various firms.

Does intraday trailing count unrealized profit?

Yes, on most firms using the intraday variant, unrealized profit on open positions is included in the high-water mark calculation. A position that runs up momentarily then reverses still locks the floor at the unrealized peak, even if no profit was banked.

Can a wick really kill my account?

Yes. A momentary five-minute wick that produces a fleeting peak balance locks the floor at that peak. If the next session produces a normal pullback, the account can breach despite a positive cumulative result. This is the main complaint about the mechanic across trader forums.

Is intraday trailing fair?

It is published in the rulebook and consistently applied, so fair in the contractual sense. Whether it suits a given trader depends on style. Scale-in or wide-stop traders typically struggle with intraday trailing; tight execution traders adapt without difficulty after a learning period.

What is the safest strategy under intraday trailing?

Tight stops, defined exits at planned profit levels, no holding through volatility, no scale-in. Bank profits at the peak rather than letting positions run beyond a planned target. The variant rewards execution discipline over hold-and-pray patience.

How much buffer should I keep above the floor?

At least one full trail amount above the floor. On a $3,000 trail, keep $3,000 of buffer at all times. If buffer falls below this threshold, close all positions and end the session. This protects against single-session pullbacks after wick-driven floor advances.

Do all Apex accounts use intraday trailing?

No. Apex applies intraday trailing only on evaluation and pre-lock funded accounts. Once the trader hits the lock threshold on a funded account, the floor locks at starting balance and behaves like static drawdown for the remainder of the account life.

How do I check if my firm uses intraday or EOD?

Read the official rulebook for phrases like 'high-water mark updates in real time' (intraday) or 'at session close' (EOD). If unclear, open a support ticket and ask explicitly. Never rely on third-party summaries; they are often outdated or wrong.

Can I trade news under intraday trailing?

Possible but risky. News candles often produce wicks that spike then reverse, which is the worst-case scenario for intraday trailing. Most experienced traders on intraday-variant accounts avoid the first thirty seconds of high-impact news entirely as a hard rule.

Why do firms use intraday trailing?

To filter for traders with tight execution discipline. Intraday trailing punishes letting winners run past planned exits, which correlates with long-term inconsistency. The firm gets a more conservative funded cohort but lower headline pass rates and weaker marketing claims.

Is intraday trailing common in forex prop firms?

Less common. Most forex prop firms use static drawdown on the eval side and EOD trailing on the funded side. The intraday distinction is more pronounced on futures products where individual contract movements produce large unrealized swings inside a single session.

Can intraday trailing be reset overnight?

No. The high-water mark is persistent across sessions. Once a peak is set, the floor only moves upward from there on subsequent peaks. There is no overnight reset. Only buying a new evaluation or a paid reset clears the high-water mark and the floor position.

Should I avoid firms with intraday trailing?

Not necessarily. Apex remains one of the most successful firms in the market despite using the variant pre-lock. The question is fit. If your style is tight execution and tight exits, intraday trailing is workable. If you prefer wide stops or scale-in, choose an EOD firm instead.