What full port means in trading
Full port is max size on one trade. Here is what one full-port loss does to an eval.
Full port means putting your maximum allowed size, or your whole account, on one trade or one idea. On a futures prop firm eval, that usually means the contract cap. For example, 5 NQ contracts on a 20-point stop risk 5 x 20 x $20 = $2,000, which is the whole trailing drawdown on a common 50K eval. Traders also call it fullport, full porting, going all in, YOLO or max size.
What full port means, and its cousins
Full port means your maximum size on one trade or one idea. In crypto slang, fullport can also mean putting a whole portfolio into a single coin. Futures prop traders use it for size: the contract cap, or a stop sized to lose the whole drawdown in one trade.
Search results also show other meanings, like managing a whole portfolio or moving coins between wallets. This page is about the trader slang.
Full port on a prop firm eval
On a futures prop firm eval, max size is a fixed cap on how many contracts you can hold at once. At a firm we checked, a 50K eval capped size at 5 minis, with 10 micros counted as 1 mini. Full port means the size button set to that cap. At least one firm's rules say you are never required to trade the max.
Some traders full port on purpose, with the setup and the size picked before the trade. In the habit, the last loss or the last win streak picks it.
What one full-port loss does to the drawdown
Take an illustrative 50K eval with a $2,000 trailing drawdown and a 5-mini cap. NQ is $20 a point per contract, and MNQ is $2. This is plain arithmetic, not results, so check your own firm's rules page for your real limits.
With a 20-point stop, 5 NQ risks 5 x 20 x $20 = $2,000. That is the whole drawdown, so one loss ends the eval.
One NQ contract risks $400, or 20% of the drawdown. It takes 5 straight losses to reach the floor.
One MNQ contract risks $40, or 2% of the drawdown. It takes 50 straight losses.
Profit from earlier sessions buys you no room until the floor locks. On an end-of-day trail, the floor follows your best closing balance up and never moves back down. Close a good week at $51,500 and the floor sits at $49,500, so one 20-point full port still puts you on it. At the firms we checked, the trail stops only when the floor locks at your starting balance or $100 above it.
At those firms, open losses also count in real time. If an open full port dips through the floor mid-trade, the account fails right then, even if price comes back. There is no room to give it, because your stop and your floor are the same line.
Some accounts trail intraday, from your highest equity with open profit included. If a full port on 5 NQ runs +10 points, which is +$1,000 open, the floor rises $1,000. If price then reverses, the account fails 10 points below your entry, not 20.
Why traders full port after losses and win streaks
The habit version tends to show up at two moments: right after a loss, and after a run of wins.
After a loss, the thought is "I just need to win it back." In real-money experiments, people who were already down found bets that offered a way back to even especially attractive, which researchers called the break-even effect (Management Science, 1990). The 1979 paper that introduced prospect theory found that people turn risk seeking when the choice is between a sure loss and a gamble (Econometrica, 1979). Max size is the fastest way back to even.
Professionals do it too. Among Treasury bond futures traders at the Chicago Board of Trade in 1998, those who lost money in the morning were more likely to take above-average risk in the afternoon than those who were up: 31.2% against 27% (Journal of Finance, 2005).
The same 1990 study found a house money effect: after a prior gain, people took more risk than they normally would. After a win streak, the day's profit can feel free, so the size button goes up.
Either way, the last trade picked the size.
The size rule that stops it
The rule is one line: size is written down before the session and doesn't change until the next one.
Work the number back from your drawdown, not from your last trade. Contracts = dollar risk per trade ÷ (stop in points x dollars per point).
Say you risk 10% of a $2,000 drawdown, which is $200, on a 20-point stop. MNQ risks $40 a contract, so the size is 5 MNQ. NQ risks $400 a contract, so it does not fit. The 10% is only an example, so pick your own share while you're flat.
If you ever full port on purpose, write that down before the open too, with the setup and the dollar loss you accept. A size chosen while flat is a plan. A size chosen after a red trade is the habit.
Not financial advice. Futures trading carries substantial risk of loss.
Where Psyke fits
Psyke is a trading psychology journal for prop firm futures traders. You write your rules in your own words, log each session after the close in about two minutes, each trade against each rule, and Psyke names the habit that keeps breaking them. Sizing up to win it back is one of six habits, called Oversized.
Psyke never says what to trade or how big, and it does not connect to your broker. There is a free plan with no card.
Questions
What is full port in day trading?
It means putting your max size, or your whole account, on one trade. On a futures prop firm eval, that is usually the contract cap. With a 5-contract cap, 5 NQ contracts on a 20-point stop risk $2,000, which can be the whole trailing drawdown on a 50K eval.
What does fullport mean on Reddit and TikTok?
It means the same thing, spelled as one word: max size on one trade or one idea. In crypto slang it can mean a whole portfolio in one coin, and futures traders use it for the contract cap or the whole drawdown on one setup.
Is full port a trading strategy?
It is a size choice. Even on a setup picked in advance, it puts the whole drawdown, or a big share of it, on one trade, so one loss can end the account or leave it close to the floor.
Should you full port a prop firm evaluation?
That is your call, made while you're flat and not mid-session. If you do it, write the setup, the size and the dollar loss you accept before the open, because a full port picked after a red trade is the habit.
Do open losses count toward the trailing drawdown?
At the firms we checked, they count in real time. An open full port that dips through the floor fails the account right then, even on an end-of-day trail, so check your own firm's rules page.
What does YOLO mean in trading?
YOLO stands for you only live once. Traders use it, and yolo'd, much like full port: one big bet on one trade or one idea.
Find the rule you keep breaking.
Start freeSources
- E-mini Nasdaq-100 (NQ) contract specs: $20 x the index (CME Group)
- Gambling with the house money and trying to break even: the effects of prior outcomes on risky choice. Management Science 36(6), 643-660 (1990).
- Prospect theory: an analysis of decision under risk. Econometrica 47(2), 263-291 (1979).
- Do behavioral biases affect prices? Journal of Finance 60(1), 1-34 (2005).
- CFA Institute digest summary of the 2005 Journal of Finance study: the 1998 Chicago Board of Trade sample and the 31.2% and 27% figures.
- Micro E-mini Nasdaq-100 (MNQ) contract specs: $2 x the index (CME Group)
Last updated October 3, 2026. Educational only. Not financial advice. Futures trading carries substantial risk of loss.