Stress Harness
What would 2015-01-15 do to your book today?
£49/mo
- Annual term
- £490/yrTwelve months of service for the price of ten.
- Billed monthly
- £588/yr£49/mo × 12. Monthly billing costs twenty per cent more than the annual term — the uplift is on monthly, it is not a discount on annual.
- The difference
- £98/yrTwo months in twelve. Paying annually saves two months, not twenty per cent — the two are different numbers and only one of them is true.
Nothing on this site is on sale. There is no checkout, no cart and no payment link on any page. Prices publish pre-launch so they can be read, compared and checked rather than requested — seat bands, group licences and multi-year terms are set out in full below.
Standing policy — read this beside the figure
- No promise of profit, ever. Hadal makes no performance claims and carries no implied edge. Past measurements describe instrument behaviour — never future returns.
- You own risk management. Hadal cannot control it and does not insure it. Good tools do not fix bad discipline — and this site says so.
- Analytical tools, for discretionary use. Nothing here is investment advice or a recommendation to trade. Every decision, and every outcome, is yours.
The same statement stands in the footer of every page.Terms Privacy
| Specification | Value |
|---|---|
| Catalogue no. | P8 |
| Suite | Desk Discipline |
| Methodology | How the Desk Discipline suite measures |
| Availability | Pre-launch — not on sale |
| Anticipated price | £49/mo · £490/yr |
| Delivery | Marketplace SKU · hub subscription |
| Published measurements | NOT YET PUBLISHED |
| Provenance artifact | NOT YET PUBLISHED |
On 2015-01-15 the Swiss National Bank removed the franc floor and EURCHF traded through an empty book. Stops did not fill at their levels, because for a stretch of that morning there were no levels — there was a liquidity void, and then there was a price a long way from where anyone had planned to be. Accounts sized against a normal-market distribution discovered they had been sized against the wrong distribution. Any stress tool that fills your stop at your stop would have called that day survivable.
The Stress Harness replays recorded shocks against the book you are holding right now, and it fills the way the market actually filled.
Sizing is what a crash breaks first. A book that is comfortable under a normal-market distribution is a different book on a morning when there is no bid, and that discovery usually arrives at speed, when resizing is no longer available. So each scenario in the library is a recorded shock replayed against the positions you hold now, at the size you hold them, and what comes back is specific enough to size against — which holding carried the damage, and whether the scenario ends the account. None of it anticipates the next crash, which by construction is not in the library.
What it measures
A replay result is only true for the positions and sizing that existed when it ran, so any change to the book leaves it describing an account that no longer exists.
- Named shock replay. The SNB floor break, the COVID liquidity collapse, carry unwinds, the gilts episode — each applied to your current positions at your current sizing, and applied jointly, in the correlation structure the event itself produced rather than the one your book displays on a quiet Tuesday.
- Gap-through honesty. Where the historical path gapped past your stop, the harness does not fill you at your stop. It fills you where a print existed. That single difference is what separates a stress test from a reassurance.
- Vacuum-fill accounting. For the interval with no quotes at all, the fill is marked at what the next real print permits and labelled as a vacuum fill, so you can see which part of the loss is measured and which part is the honest consequence of an empty book.
- Ruin flags. Where a scenario ends the account, the result is a ruin flag rather than a percentage. A book that is closed out does not have a return, and reporting one is the exact arithmetic that makes leveraged risk look survivable in a spreadsheet.
- Position-level attribution. Which position carried the damage in each scenario, so the response is a specific sizing decision rather than a general unease about tail risk.
What it does not do
The Stress Harness does not forecast the next shock. The next one is not in the library — by construction, the events that break books are the ones the sample did not contain — and a book that survives every replay here is not thereby safe. It replays recorded prices, not your venue’s discretion: requotes, spread widening, and the order in which a broker liquidates a book during a vacuum are that broker’s behaviour rather than a historical price series, and the harness states that boundary beside every ruin flag instead of implying it modelled them. It has no opinion on your strategy either; it prices the tail of the positions you already hold.
Who it is for
Anyone carrying leveraged or overnight exposure who has never watched their current book go through 2015-01-15. It sits beside the Prop-Evaluee Risk Guardian: the Guardian watches the rule boundary under normal conditions, the harness asks what a day without a bid does to the same account.
The ship gate
No instrument is sold until it does what this page says it does. Where a page is written in the future tense, that tense is a statement about timing rather than a hedge about capability: the instrument is not finished, so it is not listed as available, not priced as available, and not sold. It waits.
Nothing described in this catalogue is a placeholder that will quietly disappear. An instrument that turns out to be wrong gets a kill-ledger entry, not a deletion — which is the only version of that promise anyone can check.
Commercial terms
Published in full, pre-launch, so they can be read and checked rather than requested. Every figure is an anticipated indication I have set and not yet ratified, and every derived figure is the arithmetic of the one above it — shown, not asserted. Nothing here is purchasable: there is no checkout on this site.
Why Stress Harness is priced the way it is
- What the figure buys
- The rate covers replay of the recorded shock library — the franc-floor break, the pandemic liquidity collapse, carry unwinds, the gilts episode — against the book you are holding now, at your current sizing, applied jointly in the correlation structure the event itself produced rather than the one your book displays on a quiet day. The fills are the substance of it: where the historical path gapped past a stop, the harness fills where a print existed, and across an interval with no quotes at all the fill is marked at what the next real print permits and labelled a vacuum fill, so the measured part of a loss stays separable from the part that is an empty book. Where a scenario ends the account, the output is a ruin flag rather than a return, and position-level attribution names which holding carried the damage in each scenario. The limits are the ones printed on the page: it does not forecast the next shock, it holds no opinion on your strategy, and it does not model your venue's discretion, because requotes, spread widening and the order in which a broker liquidates a book are that broker's behaviour rather than a historical price series.
- Why it is priced this way
- The unit follows the book, not the person. A replay result is only true for the positions and the sizing that existed when it ran, so rolling a position, adding one, or sizing up leaves the previous answer describing an account that no longer exists — which is why this is a standing subscription against the account it watches rather than a report bought once. It does not count seats, because a tail is a property of a book and not of the people looking at it; where affiliated entities need cover across several books, that is the entity axis of the licence and a separate conversation. It shares the Desk Discipline suite with the Prop-Evaluee Risk Guardian for the same structural reason: both attach to an account, one watching the rule boundary under normal conditions and the other asking what a day without a bid does to the same positions.
- What the alternative costs
- You can do this by hand for one position and one event: pull the recorded path for that morning, mark the position through it, and decide where the stop would truly have filled. The effort scales badly across several positions and several events, each needing the joint move rather than the individual one, and the arithmetic was never the hard part — the honesty is, because filling at your stop is the easy assumption and it is the one that makes the answer comfortable. A platform's own risk display answers a different question: a stop level on a screen is a price you have asked for rather than one the market has undertaken to give you, and margin computed against a normal-market distribution describes the day that did not happen. Doing nothing leaves the exposure exactly where it is and moves the discovery into the event itself, when the answer arrives at speed and resizing is no longer available.
Every figure on this page is an anticipated indication awaiting ratification, and nothing here is purchasable. The reasoning above is published for the same reason the arithmetic below is: a price you can interrogate is worth more than a price you have to accept.
The two-SKU split
| Route | What it is | Anticipated |
|---|---|---|
| Marketplace SKU | Where this instrument ships through a platform marketplace, that SKU is the fully-functional standalone tier — the complete battery, running natively on your platform, no external account required. Never paid-but-crippled. | NOT YET LISTED |
| Hub subscription (this site) | The deepening: hosted runs, the published methodology behind them, and the content-hashed artifacts that let a stranger re-derive the result. This is the tier the figure on this page prices. | £49/mo · £490/yr |
The hub tier is priced at or below its marketplace equivalent. That is a standing rule the pricing table is rendered against, not an offer: a marketplace platform takes a percentage of every sale it processes, and that saving goes to the hub subscriber rather than to Hadal, so a platform fee can never invert your margin. No marketplace SKU has been listed yet, so the cell above reads NOT YET LISTED and the rule stands as a commitment rather than a comparison you can run today.
The commitment ladder
| Term | Months paid per year | What it means | Anticipated |
|---|---|---|---|
| Monthly billing | 12 | £49/mo × 12. Twenty per cent more than the annual term — that is the uplift for paying monthly, not a discount for paying annually. | £588/yr |
| 1-year term | 10 | Twelve months of service for the price of ten. This is the annual rate every band below is taken off. | £490/yr |
| 2-year term | 9 | Ten per cent off the annual rate, held at that figure for the whole term. | £441/yr |
| 3-year term | 8 | Twenty per cent off the annual rate, held at that figure for the whole term. | £392/yr |
Eight months paid per year, across three years, is 24 months paid for 36 months of service — one year in three carries no charge. On this instrument the three-year term totals £1,176. That is 24 × £49 = £1,176, and two years billed monthly is £588 × 2 = £1,176. The same money. It buys three years instead of two, and the arithmetic is on the page so you can check it rather than take it.
Group licences, across entities
Licensing here is per account or per desk, not per seat, so a seat band does not apply and none is offered — applying one would be a category error dressed as a discount. The scaling axis here is entities: where the same instrument is run by more than one legal entity, desk, fund or network inside a group, the licence is negotiated as a single group licence rather than replicated entity by entity. Multi-network clients are exactly the case this exists for, and the commitment ladder above applies to a group licence on the same terms it applies to a single one.
Commercial routes
Pricing scales on entities and on term — one negotiated group licence across desks, funds and legal entities, never a seat band.
Licensing — seat bands, group licences and multi-year terms in full
Support
- TierStandard at this instrument’s base contract — ticket, first response targeted at three business days. Support tier follows the annual contract value, not the price of a single unit — more seats, a suite licence or a group agreement raise the contract value and can raise the tier with it.
Support — the tiers, the ticket-only channel model, and what a target does and does not promise
Trial mechanics
The trial runs on the hub tier — thirty days, a full natural proof cycle, disclosed in plain words before you start it and cancellable in one step; none of it is live yet. Trial mechanics in full, by delivery class.
Read before you commit
The documentation is published ahead of the product on purpose — intended behaviour is only a commitment if it exists first. Start with installation and first run, then the limits: the conditions under which this instrument refuses to produce a number are the part worth reading before you pay. The full centre is at /docs/, and the support model states what a ticket does and does not cover.
Questions and answers
Answered from what this instrument publishes about itself. Nothing below is attributed to a customer, because there are none yet.
Does the harness fill my stop at my stop?
No. Where the historical path gapped past your stop, it fills you where a print existed, and an interval with no quotes at all is marked as a vacuum fill. That single difference is what separates a stress test from a reassurance.
If my book survives every scenario, is it safe?
No. The next shock is not in the library — by construction, the events that break books are the ones the sample did not contain. Surviving the replays is not a safety claim.
Does it model how my broker would behave during the shock?
No. It replays recorded prices, not your venue’s discretion. Requotes, spread widening and the order in which a broker liquidates a book during a vacuum are that broker’s behaviour, and the harness states that boundary beside every ruin flag.
Can I buy this instrument today?
No. Nothing on this site is on sale — there is no checkout, no card capture, and no product account to create. Every figure on this page is an anticipated indication I have set so it can be read and compared, not an offer, and final pricing awaits my ratification. The launch list is the only thing you can join today.
Change log
Stress Harness has not shipped, so there is nothing to record. When it does, every version lands here — dated, append-only, written by a person, and including the changes that removed a capability rather than added one.
Where this sits
Stress Harness is one of the instruments in the Desk Discipline suite. How that suite measures — the per-instrument battery, and the receipts each measurement will carry — is set out in the Desk Discipline methodology, part of the site-wide measurement methodology.
Also in the Desk Discipline suite
Stress Harness shares the Desk Discipline suite with two other instruments.
- P3Prop-Evaluee Risk GuardianDrawdown-halt monitoring, sizing grids, risk-of-ruin surfaces, correlation-adjusted heat.
- P22Latency Arb TrackerDetect structural front-running before the execution desk calls you.
Research behind this instrument
Stress Harness draws on four research notes on this site.
- Why was my account breached in profit?Asked as: "why was my account breached while in profit"
- Is a drawdown limit on balance or equity?Asked as: "is my drawdown limit calculated on balance or equity"
- What causes a prop firm drawdown breach?Asked as: "what causes a prop firm drawdown breach"
- Why do backtests fail in live trading?Asked as: "why do backtests fail in live trading"