# Consistency Rule > An evaluation rule capping the share of profit that any single trading day may account for, so that a target reached by one outsized day does not qualify even when the total is met. - Canonical: https://hadalinstruments.com/glossary/consistency-rule/ - Term set: https://hadalinstruments.com/glossary/ --- A consistency rule caps how much of a result any single trading day may account for. The rationale is legible enough: a target reached across many sessions is different evidence from the same target reached in one, and an evaluation is trying to distinguish a process from a bet. The rule is a crude test for that distinction, and it is crude in a specific and consequential way — it catches an exceptional day whether that day was reckless or simply good. The percentage is the part everyone reads and the part that matters least. What decides the outcome is the **base**: the quantity the percentage is a percentage of. Three are in circulation. Against the **profit target**, the denominator is fixed before the evaluation begins. Against **total net profit**, it moves with the account and losing days shrink it. Against the **sum of profitable days**, losing days are ignored entirely, so it is always at least as large as net profit and correspondingly more forgiving than it. Whether either exceeds the profit target depends on how far through the evaluation you are, so there is no fixed ranking across all three. The same largest day, on the same record, produces three different percentages — and the ordering is structural rather than incidental, because the sum of profitable days differs from net profit by exactly the losing days. A trader who has given a lot back sits in the widest gap. This is why the arithmetic is worth doing properly rather than approximately. A record that reads as compliant against the most generous base can be over the threshold against the strictest, and reading the rule as "thirty percent" without identifying the denominator is not reading the rule at all. Where the spread straddles the threshold, the useful output is not a verdict; it is knowing precisely which sentence of the agreement to go and find. The remedy also depends on the base, and this is where generic advice does real damage. Where the denominator moves — net profit, or the sum of winning days — further profit enlarges it and the ratio falls, so there is an amount of additional profit that closes the gap. Where the denominator is the profit target, there is not: the target was fixed before the first trade and no subsequent result moves it. Advice to "trade more to comply" is therefore inert under one of the three conventions, and the trader following it is spending risk on an outcome that cannot arrive. Consequences vary and are not derivable from the rule itself. Where publishers state one, it is not always termination — a payout being reduced, delayed, or made conditional on additional trading days all appear in the wild. Since the rule text is the only thing that governs any particular account, the two sentences worth locating are the one naming the base and the one naming the consequence. Neither follows from the percentage. The [consistency rule calculator](/tools/consistency-rule-calculator/) computes all three bases at once and reports the spread, along with what additional profit would close a shortfall under each. Related constraints on the same evaluation are the [daily loss limit](/glossary/daily-loss-limit/) and the [trailing drawdown](/glossary/trailing-drawdown/), and [why an account can be breached while closing in profit](/research/why-was-my-account-breached-in-profit/) is a separate mechanism again. ## Commonly confused with Neighbouring concepts that get used interchangeably, and the distinction that actually separates them. - **[Daily loss limit](https://hadalinstruments.com/glossary/daily-loss-limit/)** — Both are day-scoped and they point in opposite directions. A daily loss limit caps what a single day may take away; a consistency rule caps what a single day may contribute. One is breached by a bad day, the other by a good one, and a trader can satisfy either while failing the other on the same record. - **[Drawdown limit](https://hadalinstruments.com/glossary/drawdown/)** — A drawdown rule constrains the shape of the equity path downward. A consistency rule constrains the distribution of the gains, and is indifferent to the path. Passing every drawdown test says nothing about consistency: an account that never declined at all can still have earned its entire result in one session. - **Minimum trading days** — Frequently bundled into the same clause and routinely read as the same rule. A minimum-days requirement counts days; a consistency rule measures concentration. Trading the required number of days satisfies the first and can leave the second untouched, because five days with four of them flat is still one day carrying the result. - **The profit target** — The target says what you must reach. The consistency rule constrains how you were allowed to reach it. They are assessed separately, which is why a record can hit the target exactly and still not qualify — and why hitting the target early, in one move, is the specific way that happens. ## How to measure it in your own data A definition you cannot test is a definition you have to take on trust. This is the shortest honest route from the concept to a number you computed yourself. - **Records you need** — Your daily profit-and-loss series for the evaluation, and the sentence in the rule document naming what the percentage is taken of. Without that second item the arithmetic has three possible answers rather than one. - **What you compute** — Divide your largest winning day by the base the rule names. Where the rule does not name one unambiguously, compute all three candidates — the profit target, total net profit, and the sum of profitable days — and read the range rather than picking a favourite. - **What the answer tells you** — The spread between those three quotients is the finding. Where it sits entirely below the threshold the question is closed; where it straddles the threshold you have not measured anything yet, you have identified which sentence of the rule document you need to read. The gap between the net-profit base and the sum-of-winning-days base is exactly your losing days, so a trader who gives a lot back is the trader most exposed to the ambiguity. ## Questions and answers ### What is a consistency rule measured against? What the rule measures against is the whole question, and it is not standardised. Three bases are in circulation: the profit target, total net profit, and the sum of profitable days. The same largest day produces a different percentage against each, so a record can pass under one convention and fail under another without a single trade changing. Your own rule document is the only thing that settles it. ### Does breaching a consistency rule close my account? Not necessarily, and it is worth checking rather than assuming the worst. Where publishers state a consequence it is not always termination — some describe a payout being reduced, delayed, or made conditional on further trading days instead. What applies to you is in your own agreement, and nothing published elsewhere overrides it. ### Can I fix a consistency shortfall by trading more? Whether more trading fixes a shortfall depends entirely on the base, and this is where most advice goes wrong. If the rule measures against total net profit or the sum of profitable days, further profit enlarges the base and the ratio falls. If it measures against the profit target, it does not: the target was fixed before you started, and no later profit moves a denominator that cannot move. ### Why would a rule punish a good day? A consistency rule is not aimed at the day, it is aimed at what the day implies about the record. A result concentrated in one session is weak evidence of a repeatable process and strong evidence of a single large bet, and the two are indistinguishable from the outside. The rule is a crude test for that, and it catches genuine outliers as well as reckless ones. ### Does a consistency rule interact with my position sizing? Directly, and asymmetrically. Once a large day is on the record it becomes the numerator, and the only remedies are to enlarge the base or to wait. That makes an outlier day a constraint on everything after it, which is the practical reason a trader carrying one tends to reduce size rather than press. ## If this has already cost you If a payout was reduced or refused on consistency grounds, the ratio behind that decision can be recomputed from your own daily record — against each base the rule could have meant. - [Payout-Denial Recompute](https://hadalinstruments.com/assays/#payout-denial-recompute) “Does the arithmetic behind my denied payout actually hold?” Will not establish: Whether the firm must pay. A recomputation shows whether the stated condition was met under the stated rules; contract interpretation and enforcement belong to the firm, a regulator where one exists, or your own adviser — armed with arithmetic instead of assertion. - [Prop-Breach Forensics](https://hadalinstruments.com/assays/#prop-breach-forensics) “Why did my prop evaluation actually fail?” Will not establish: Whether the firm’s rules are fair, or whether you would have passed with different luck. It reconstructs what happened; it does not adjudicate the firm. Intake is not open yet, so none of these can be commissioned today. They are listed here so you know the measurement exists and what it would and would not settle — the [launch list](https://hadalinstruments.com/pricing/#waitlist) hears first. ## Work it out yourself Free calculators that take this concept as an input. Each shows its working, so the number it gives you can be checked rather than taken on trust. - [Consistency rule calculator](https://hadalinstruments.com/tools/consistency-rule-calculator/) Three denominators at once · The spread between them ## Related terms Derived from the links this entry makes and the entries that link back to it. - [Daily Loss Limit](https://hadalinstruments.com/glossary/daily-loss-limit/) A rule ending or suspending an account when losses within a single trading day exceed a set amount, assessed against a baseline that resets each day rather than against the account's overall decline. - [Hard Breach](https://hadalinstruments.com/glossary/hard-breach/) A rule breach whose stated consequence is the end of the account: the condition fires, the account is closed or its open positions are liquidated, and the programme is over subject to whatever the agreement says follows. - [Soft Breach](https://hadalinstruments.com/glossary/soft-breach/) A rule breach whose stated consequence is something other than ending the account — a warning, a suspension pending review, a requirement of further trading, or a constraint on what may be withdrawn. - [Trailing Drawdown](https://hadalinstruments.com/glossary/trailing-drawdown/) A drawdown limit measured from an account's high-water mark rather than its starting balance, so that the termination floor rises as the account makes new highs and never retreats. ## In the research Consistency Rule comes up in three research notes on this site. - [What a funded trading account breach means](https://hadalinstruments.com/research/what-a-funded-trading-account-breach-means/) Not a data breach. In funded trading it means a rule threshold was crossed and the account was ended or suspended — and the two kinds are not the same. - [What can a trading statement prove?](https://hadalinstruments.com/research/what-can-a-trading-statement-prove/) Its own arithmetic and the facts inside the file — the closed ledger — but never the market around your fills, a quote's honesty, or anyone's intent. - [Where a funded-account breach dispute can go](https://hadalinstruments.com/research/where-does-a-breach-dispute-go/) The routes a UK trader can take after a funded account is closed against a rule — and the gate on each one, which is where most of them actually end. ## Cite This Definition APA BibTeX HTML Hadal Instruments. (2026). Consistency Rule. Hadal Glossary. https://hadalinstruments.com/glossary/consistency-rule/ Version 2b360a7, 2026-08-28. @misc{hadal_2026_consistency-rule, author = {Hadal Instruments}, title = {Consistency Rule}, year = {2026}, url = {https://hadalinstruments.com/glossary/consistency-rule/}, howpublished = {Hadal Glossary}, version = {2b360a7}, note = {Pre-launch publication; version dated 2026-08-28} } Source: Hadal Instruments, Consistency Rule. Original Research Copy Citation **Version 2b360a7** identifies the commit that last changed this page in Hadal's content repository. That repository is not public, so the identifier does not resolve externally — it is published so a citation pins one specific state rather than a moving page. To obtain the exact version cited, use the [press and research route](https://hadalinstruments.com/press/).