EOD Trailing Drawdown Explained: How the 5% Rule Works

One of the most important numbers in a futures prop trading account isn't the advertised account balance.

It's the maximum amount the trader is permitted to lose.

A $50,000 account may sound substantial, but that figure alone tells you very little about the actual risk available to the trader. The more meaningful questions concern the maximum loss, how that loss is calculated, and whether the threshold changes as the account becomes profitable.

This is where the distinction between an end-of-day (EOD) trailing drawdown and an intraday trailing drawdown becomes important.

Two futures proprietary trading firms can advertise the same account size and the same maximum loss percentage while operating under materially different risk structures.

Understanding those differences before placing the first trade is essential.

At 18th Street Trading, every simulated qualification phase uses a 5% end-of-day trailing maximum loss, with the threshold locking at the starting balance once the account achieves a 5% closing gain.

The structure is designed around a principle that defines the firm:

Risk management before profitability.

What Is a Trailing Drawdown?

A trailing drawdown establishes the lowest account value permitted before a trading account is considered breached.

Unlike a fixed loss threshold, a trailing drawdown can move upward as an account becomes profitable.

Consider a $50,000 trading account with a $2,500 maximum trailing loss.

At the beginning, the loss threshold is $47,500.

If the account generates profit, the threshold may move higher depending on the firm's calculation method.

The important distinction is that the threshold generally does not move downward when the account experiences losses.

As a result, the trader's available risk changes as the account develops.

This is why traders should never assume that a profitable account automatically has more room to absorb losses.

Profitability and available drawdown are related, but they are not the same thing.

End-of-Day vs. Intraday Trailing Drawdown

The difference between these two structures comes down to when the trailing threshold is recalculated.

An intraday trailing drawdown can adjust throughout the trading session as account equity reaches new highs, including unrealized profits on open positions.

For example, a trade may temporarily generate $1,500 in unrealized profit before closing with only $300 in profit.

Under an intraday trailing structure, the temporary $1,500 increase may have already raised the loss threshold.

That movement can reduce the amount of room available to the trader, even though the larger profit was never realized.

An end-of-day trailing drawdown operates differently.

Instead of recalculating the threshold continuously against intraday equity highs, it adjusts according to qualifying end-of-day account balances.

That distinction can materially change how a trader manages open positions.

However, an end-of-day calculation should not be confused with permission to disregard the existing loss threshold during the session. Traders must continue respecting their firm's active risk boundaries.

The timing of the calculation changes.

The responsibility to manage risk does not.

How 18th Street Trading's 5% EOD Trailing Loss Works

At 18th Street Trading, the maximum trailing loss is 5% of the selected simulated plan size.

The same percentage applies to every plan and every qualification phase.

For a $25,000 plan, the maximum trailing loss is $1,250.

For a $50,000 plan, it is $2,500.

For a $100,000 plan, it is $5,000.

For a $150,000 plan, it is $7,500.

The dollar amounts increase with the account size, but the underlying standard remains identical.

Let's examine the $50,000 plan more closely.

The starting account balance is $50,000.

The initial loss threshold is $47,500.

If the trader closes the first profitable session with a balance of $51,000, the trailing threshold increases to $48,500.

The account has gained $1,000.

The loss threshold has also moved upward by $1,000.

Now suppose the account eventually closes at $52,500.

That represents a 5% gain from the starting balance.

At this point, the trailing loss threshold reaches $50,000 and locks at the starting balance.

It no longer advances.

If the account subsequently closes at $54,000, the threshold remains at $50,000.

The trader has now established additional distance between the account balance and the fixed loss threshold.

This is an important characteristic of the 18th Street structure.

The trailing mechanism is not indefinite.

Once the published condition is satisfied, the threshold becomes fixed.

These calculations reflect the firm's current published Qualification specifications.

Why the Trailing Loss Lock Matters

The point at which a trailing drawdown stops moving can have significant implications for a trader's risk management.

Before the threshold locks, qualifying increases in the account's end-of-day balance also increase the loss threshold.

After the lock, the threshold remains fixed.

Consider the same $50,000 account.

At a closing balance of $52,500, the threshold locks at $50,000.

If the trader subsequently grows the account to $54,000, the account has $4,000 between its balance and the fixed threshold.

That does not mean the trader should attempt to use the entire amount.

It means the relationship between account growth and the loss boundary has changed.

The trader is no longer operating with a threshold that continues following each new closing high.

Understanding that distinction is particularly important when planning position sizes and determining how much risk is appropriate as an account progresses.

No Daily Loss Limit Does Not Mean Unlimited Risk

Another distinction in the 18th Street Trading structure is the absence of a separate daily loss limit during the simulated phases.

Some futures prop firms apply both an overall maximum loss and an additional daily loss restriction.

18th Street uses its published 5% EOD trailing maximum loss without adding a separate daily loss limit.

That provides traders with discretion in managing their daily activity.

But discretion should never be confused with unlimited risk.

A trader remains responsible for protecting the account against the maximum trailing loss threshold.

The absence of a daily loss rule does not eliminate the possibility of an account breach.

Nor does it remove the need for a personal daily risk limit.

In fact, traders who approach futures trading professionally should establish their own risk parameters before entering the market.

Those parameters may be substantially more conservative than the maximum permitted by the firm.

The CME Group's educational guidance on position sizing emphasizes determining position size from the location of the stop and the amount of capital the trader is willing to risk.

That approach aligns directly with the 18th Street philosophy.

The firm's maximum loss defines a boundary.

The trader's own risk management should determine how they operate well inside it.

The Relationship Between Drawdown and Position Sizing

A common mistake among developing futures traders is determining position size from the advertised account balance rather than the actual amount of risk available.

A trader looking at a $100,000 simulated account may feel comfortable trading aggressively because the displayed balance appears substantial.

But under a 5% trailing loss structure, the initial maximum permitted loss is $5,000.

That is the more relevant figure when evaluating risk exposure.

A trader who risks $1,000 on a single trade is exposing an amount equivalent to 20% of the initial maximum loss allowance.

Five consecutive losses of that size would exhaust the initial allowance, assuming no intervening profits or other adjustments.

That is very different from thinking of the trade as risking only 1% of a $100,000 account.

The distinction is fundamental.

The advertised balance establishes the scale of the plan. The maximum loss defines the account's risk boundary.

Professional traders should understand both.

Why Risk Management Comes Before Profitability

A trading strategy can generate impressive profits and still be unsuitable for a disciplined trading environment.

If the strategy depends on dramatically increasing position size after losses, repeatedly exposing the account to its maximum permitted drawdown, or relying on a single oversized winning trade, the apparent profitability may conceal substantial risk.

This is one reason 18th Street Trading combines its 5% EOD trailing loss with a 9% profit target and a 25% consistency requirement across all four simulated phases.

The objective is not simply to determine whether a trader can generate profit.

It is to evaluate whether that profit can be generated while respecting defined risk parameters.

One successful phase demonstrates something.

Repeated success under the same requirements begins to establish a record.

That record is what ultimately supports progression toward live capital.

The Institutional Standard

Professional trading begins with understanding the risk before pursuing the opportunity.

That means knowing where the account's loss threshold sits, how the threshold changes, how position sizing affects available capital, and when the appropriate decision is not to trade.

At 18th Street Trading, the EOD trailing loss is one part of a larger framework built around discipline, consistency, and earned progression.

Every trader begins at Phase 1.

Every phase uses the same risk standard.

And advancement cannot be purchased.

For traders who believe professional trading should be measured by more than one profitable session, the structure provides a defined opportunity to demonstrate that approach.

Institutional Standard. Professional Traders.

Explore the complete qualification requirements, account sizes, and progression structure at 18th Street Trading.

Earn Your Progression. Apply for Capital Access.

Futures trading involves substantial risk and is not suitable for every trader. Past performance is not necessarily indicative of future results. Qualification phases at 18th Street Trading operate in a simulated environment using notional capital. Account participation does not guarantee successful completion, payouts, or progression to a Live account.