What Should a Prop Firm Trader's Journal Record?
A prop trader's journal needs three fields an ordinary one has no reason to carry: how far today's loss is from the daily limit, how far the account is from the trailing floor, and whether this position would breach either if it stopped out. The limits, not the market, are the binding constraint.
Why is a prop journal different?
Because a normal journal records what the trade did and a prop journal has to record what the trade did to your remaining room. Two positions with identical entries, stops and outcomes are not equivalent if one of them was taken with $8,000 of headroom and the other with $900. The second is a different decision and an ordinary journal makes them look the same.
The three fields that matter
1. Distance to the daily limit, at entry
On a $100,000 evaluation account with a 5% daily loss limit and a 10% overall limit the daily limit is $5,000. Record how much of it today's trading has already consumed at the moment you enter — not at the end of the day, when the number is history. A $2,000 risk with $2,400 of daily room left is a position that cannot be held to its stop, which means the stop in your plan is not the stop you will actually use.
2. Distance to the floor, and whether the floor moves
Record the floor itself, because on a trailing account it is not a constant. A $10,000 trailing
limit on $100,000 starts the floor at $90,000; make $3,000 and it ratchets to
$103,000 − $10,000 = $93,000 and stays there. Hand the $3,000 back and your room
has gone from $10,000 to $7,000 while your balance reads exactly what it did on
day one.
That is why the floor is a field and not something you recompute from memory. A journal recording only balance and PnL shows a flat month; the account has meanwhile lost a third of its capacity to absorb a bad day, and that is the number that ends accounts.
3. Would this trade breach if it stopped out?
A yes/no field, computed before entry, and the most valuable line in the whole journal. It turns an abstract rule into a per-trade check, and it is the field that catches the specific failure prop traders actually have: a position sized by habit rather than by remaining room.
How do the limits set the size?
Work backwards from the limit rather than forwards from custom. The overall limit divided by your risk per trade is the number of consecutive losses that ends the account — and you want that comfortably past a realistic streak.
| Risk per trade | Losses to breach a $10,000 limit | How often that streak turns up |
|---|---|---|
| 2% ($2,000) | 5 | Nearly twice per 100 trades |
| 1% ($1,000) | 10 | About one account in 32 |
Halving the size is the whole difference between a plan that survives an ordinary bad run and one that does not, and it is a sizing decision rather than a skill one.
What should you keep recording after the evaluation?
All of it, and outside the firm's systems. The dashboard shows your progress against their limits, which is what it is for; it is not an artifact you keep. A record made inside a firm's account, on the firm's platform, is theirs to display or not, so it does not follow you to the next firm or to anyone assessing you afterwards.
kappi is broker-agnostic. Commits are made from the Chrome extension, so any brokerage works — or your own journal, kept wherever you already keep it. No import, no account linking, no requirement to trade inside someone else's platform.
What does the parallel record add during the evaluation?
- A stop you cannot quietly move. The commit fixes the level before the outcome, so widening it later is a visible act rather than a private edit — which matters more under a daily limit than anywhere else, because a widened stop is how a limit gets breached.
- Sizing history that survives a reset. If the account resets, the firm's record of how you traded resets with it. Yours does not.
- Evidence for the next assessor. Every sealed commit is hashed into a Merkle tree and anchored to Hedera, so the log is append-only and independently checkable.
Worth knowing that these constraints move. In 2026 FINRA amended Rule 4210 to replace the day-trading margin provisions entirely, removing the pattern-day-trader designation and the $25,000 minimum equity that went with it, in favour of intraday margin measured against actual exposure.[1] A journal built around a specific threshold ages with the rule; one that records your distance to whatever limit currently applies does not.
Size is the column that earns the field, and both the theory and the regulators point at it. Kelly showed in 1956 that growth is maximised at a finite fraction of capital, and that exceeding that fraction lowers long-run growth even when the edge is real.[2] ESMA acted on the same variable in 2018, capping retail CFD leverage after national analyses found 74–89% of accounts lost money, with average losses of €1,600 to €29,000.[3]
kappi is a trade recorder: you commit a trade before the fact, it is sealed on your device for a time-capsuled delay you choose, then kappi publishes it on a Merkle-anchored log. It is broker-agnostic and account-agnostic, so the record is yours wherever you trade. $15/month, no free tier.
Sources
- FINRA Regulatory Notice 26-10 — Rule 4210 amended to replace the day-trading margin provisions, removing the pattern-day-trader designation and its $25,000 minimum equity requirement read 2026-08-16
- Kelly, 'A New Interpretation of Information Rate', Bell System Technical Journal 35(4), 1956, 917–926 read 2026-08-16
- ESMA product intervention on CFDs, 23 March 2018 — national analyses found 74–89% of retail CFD accounts lose money, average losses €1,600–€29,000 read 2026-08-16
Frequently asked questions
What should a prop firm trader record that other traders don't?
Three things: how much of the daily limit today's trading has already consumed at the moment of entry, the current distance to the drawdown floor, and whether this position would breach either limit if it stopped out. Those are decisions about room, and a normal journal has no field for them.
How do I size positions under a prop firm drawdown limit?
Divide the limit by your intended risk to get the number of consecutive losses that ends the account. On a $10,000 limit, 2% risk gives 5 losses — an expectation of 1.77 occurrences per 100 trades at a 55% win rate. At 1% it is 10 losses, or 0.031 expected.
Does a trailing drawdown shrink as I make money?
Not at the peak — the floor rises with you, so a $10,000 trailing limit on $100,000 still leaves $10,000 of room at a $103,000 high-water mark, with the floor at $93,000. It bites when you give the profit back: at $100,000 again the floor is still $93,000, so the room is $7,000 rather than the $10,000 you started with.
Should I use the firm's journal or my own?
The firm's dashboard tracks your progress against their limits, which is what it is for. It is not an artifact you keep: a record inside their account on their platform is theirs to display or not, so anything you want to carry to the next firm has to be kept outside it.