Trailing drawdown explained: how the floor moves, step by step
A trailing drawdown is a floor that follows your account up but never comes back down. It's the prop firm rule that surprises people most. Here's exactly how it moves.
The floor that follows you up
A Drawdown is a drop from a high point. In a prop firm account, the max drawdown sets a floor. If your balance touches it, the account fails.
A trailing drawdown means the floor moves up when your account makes a new high. It never moves back down.
Our prop firm challenge guide shows the basic idea in one table. This page goes deeper: the 3 styles, the open-profit trap, and how to turn the room you have into a trade size. All numbers are made-up examples, not any firm's real terms.
The 3 styles
| Style | When the floor moves up | What counts as a "high" |
|---|---|---|
| Static | Never | — |
| End-of-day trailing | After each day's close | Your highest closing balance |
| Intraday trailing | Live, during trades | Your highest balance including open gains |
Same account, same trades, three very different results. Let's see how.
One day, three styles
Account: $50,000. Max drawdown: $2,000. So the starting floor is $48,000.
On day 1 you take one trade. It goes $800 in your favor, then comes back. You close it at +$100. Your balance ends the day at $50,100.
| Style | Highest balance counted | New floor | Room left at day's end |
|---|---|---|---|
| Static | — | $48,000 | $2,100 |
| End-of-day trailing | $50,100 (the close) | $48,100 | $2,000 |
| Intraday trailing | $50,800 (the open peak) | $48,800 | $1,300 |
Read the last row slowly. You made $100. But the floor rose $800, because the trade was once up $800. You now have $700 less room than when you started.
This is the open-profit trap. With an intraday trailing drawdown, a winning trade that gives back its gains can shrink your room more than a small loss would. That's a math example, not a promise.
Why intraday trailing changes how people trade
With intraday trailing, every tick of open profit raises the floor for good. That leads to two common habits:
- Using a set target and taking it, rather than letting trades run and fall back.
- Using smaller size, so open swings don't push the floor up as fast.
Neither is right for everyone. The point is: the rule's style should shape your plan before you trade, not after.
Check this first: does the floor trail on closing balance, or on live balance including open trades? It's often one line in the rules. It changes everything.
When the floor stops moving
At many firms, the trailing stops once the floor reaches a set level, often the starting balance. After that, the floor stays put.
Example with a $2,000 drawdown that stops at $50,000:
| Day | Closing balance | Highest so far | Floor |
|---|---|---|---|
| Start | $50,000 | $50,000 | $48,000 |
| 1 | $51,200 | $51,200 | $49,200 |
| 2 | $50,600 | $51,200 | $49,200 |
| 3 | $52,000 | $52,000 | $50,000 (stops trailing) |
| 4 | $53,500 | $53,500 | $50,000 |
| 5 | $52,100 | $53,500 | $50,000 |
From day 3 on, the floor is fixed at $50,000. On day 5 you're $2,100 above it. Before day 3, a $2,000 drop from any high would have failed the account.
Firms differ on where it stops, and some never stop. Read yours.
Turn the room into a trade size
The room above your floor is your real budget. Here's how to turn it into contracts.
Say your room is $1,300, and you never want one day to use more than a third of it. That's about $430 for the day.
You trade MES (Micro E-mini S&P 500): 0.25 points = $1.25, so 1 point = $5. Your stop is 6 points.
| Contracts | Loss per stop | Stops that fit in $430 |
|---|---|---|
| 1 MES | $30 | 14 |
| 3 MES | $90 | 4 |
| 7 MES | $210 | 2 |
| 1 ES | $300 | 1 |
The chart sets the stop. The room sets the size. Our futures tick value calculator works out the dollar value of any stop, and how to set a stop loss covers where the stop goes.
How the daily limit and the drawdown work together
Many accounts have both a daily loss limit and a trailing drawdown. They're separate rules. Whichever you hit first applies.
| Situation | Daily limit $1,000 | Room to floor $1,300 | What ends first |
|---|---|---|---|
| Fresh account, full room | $1,000 left today | $2,000 left | Daily limit |
| After a few good days | $1,000 left today | $1,300 left | Daily limit, barely |
| After the floor rose near you | $1,000 left today | $600 left | The drawdown |
When the floor is close, the drawdown can end the account before the daily limit even comes into play. Check both numbers every morning.
A simple morning routine
- Write down today's floor and your current balance.
- Room = balance − floor.
- Today's budget = the smaller of your daily limit and a share of the room you choose (like a third).
- Size every trade so your planned stops fit inside that budget.
- Stop for the day if you reach it. See daily loss limit.
Common mistakes
- Thinking "I'm up overall, so I'm safe." The floor follows your highs, not your start.
- Letting open profit run back to break-even on an intraday trailing account. The floor already moved.
- Measuring room from the starting balance instead of from today's floor.
- Ignoring the stop-trailing level. Knowing when the floor freezes changes your plan.
Try it today
- Take your last 10 practice trades. Note each one's best open gain and its final result.
- Run them through the 3-style table above, starting from $50,000 with a $2,000 drawdown.
- Work out your room at the end under each style.
- Which style would have failed you first? Why?
- Write one rule for your plan that fits that style. More on why accounts fail in why most prop challenges fail.
Questions
What is a trailing drawdown in a prop firm?
It's a loss floor that rises as your account's highest balance rises and never falls. If your balance touches the floor, the account fails.
What is the difference between intraday and end-of-day trailing drawdown?
End-of-day trailing moves the floor based on your highest closing balance. Intraday trailing moves it based on your highest live balance, including open gains you never closed.
Does the trailing drawdown ever stop moving?
At many firms, yes. The floor often stops rising once it reaches a set level, such as the starting balance. Some firms work differently, so check the written rules.
Can I fail a prop firm account while making money?
Yes. With trailing drawdown, a big rise followed by a smaller fall can touch the raised floor even if you're above your starting balance overall.
How do I calculate my room to the trailing drawdown?
Take your current balance and subtract today's floor. That gap is the most you can lose before the account fails, so size your trades to fit inside it.
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