Last updated: August 2026.
These terms govern the sale of TSOPEN and your right to use it. They are written to be read, not to be survived, so they are in plain English and they say the awkward parts out loud. By buying a license, downloading the software or using it, you accept them. If you do not accept them, do not buy and do not install.
They should be read with the legal notice, the privacy policy, the refund policy and the risk disclosure. Together they are the entire agreement between us.
1. Who these terms are between
These terms are an agreement between Marbo Technologies OÜ, company registration number 17424371, of Tornimäe tn 5, 10145 Tallinn, Estonia ("we", "us", the seller), and the person or company that buys a license ("you", the customer). Rentabilio is the brand this site trades under.
You must be at least 18 years old and legally able to enter a contract where you live. If you are buying on behalf of a company, you confirm you are allowed to bind it.
2. What you are buying
You are buying a non-exclusive, non-transferable, revocable license to use the TSOPEN software on your own computers, in the number of seats you paid for, for as long as you comply with these terms. You are buying the right to use a program. You are not buying the program itself: the software, its source, its logic and everything around it stay the property of Marbo Technologies OÜ.
The software is an automated trading strategy that runs inside NinjaTrader 8 on hardware you control. Getting NinjaTrader 8, a data feed and a brokerage or funded account is your side of the arrangement, on those providers' own terms, at their own prices.
3. What you are not buying
This matters more than anything else in this document, so it gets its own section. You are not buying:
- a trading service, a managed account or any form of discretionary account management;
- investment advice, a recommendation, a signal service or a financial product;
- any promise, projection or guarantee of profit, income or performance;
- any right to have us trade, monitor, supervise or intervene in your account.
We never hold your funds, never receive credentials to your brokerage or funded account, and never place an order on your behalf. Neither Rentabilio nor Marbo Technologies OÜ is a registered broker-dealer, investment adviser, CTA or CPO. Every performance figure published on this site is a backtest: hypothetical performance, produced with the benefit of hindsight and with no money at risk. The risk disclosure forms part of these terms.
4. Seats: how many computers
A seat is one computer running the software at one time. Your license carries the number of seats you chose at checkout, up to a maximum of 3. Extra seats are bought with the license, at checkout, at the price shown there; the seat count is set at purchase and adding seats later is a new purchase.
When the software starts, it registers the machine it is running on against your key using a fingerprint derived from that machine. That is how a seat is counted, and it is the only reason the fingerprint exists. Seats are for computers you control: a desktop and a laptop, a home machine and a VPS. They are not a way to share one key among several people.
You are not locked to the hardware you started on:
- a seat that has not checked in for 21 days releases itself automatically, so a reformat, a dead drive or a retired machine never costs you a seat permanently;
- you can release a seat yourself, immediately, from your account area, which lists every machine currently using the license;
- releases are logged, and we may limit an unreasonable number of them in a short period. That is how we tell somebody changing computers from somebody rotating a key among friends.
5. How long the license lasts
The license does not expire. There is no subscription, no renewal date and no annual fee: you pay once and the right to use the version you bought is yours indefinitely, subject to these terms.
Support and updates are a different thing, and they are tied to the product rather than to a clock. While TSOPEN is a product we sell and maintain, you get access to its updates through your account area and to support through the contact form. If a version of NinjaTrader 8, of Windows or of a data feed changes in a way that breaks the software, fixing it is what an update is for. If we ever retire the product, the license you hold keeps working on the version you already have, but new updates and support for it will stop, and we will say so plainly rather than letting it fade out. An update is not a promise of a different or better system, and a materially different product is a different product, not a free upgrade.
6. What you may do, and what you may not
You may install and run the software on the number of seats you paid for, use it on live or simulated accounts, use it on a funded account subject to that firm's rules, move it between your own machines by releasing and reusing seats, and take backup copies for your own use.
You may not:
- resell, rent, lease, lend, sublicense, distribute or give away the software or your license key, or transfer them with a sold computer;
- share your license key, your account access or the software files with anyone else, publicly or privately;
- publish the software, upload it to a file host, a repository, a forum or a marketplace, or bundle it into another product;
- decompile, disassemble, reverse engineer or otherwise attempt to derive the source code, the logic or the parameters of the strategy, except to the narrow extent that applicable law says you may despite a contract term;
- modify, patch or create derivative works from the software, or remove or alter any notice, key check or licensing mechanism in it;
- circumvent, disable or tamper with the activation or seat system, or run the software with a key you were not issued;
- use the software to provide a trading, signal or management service to third parties, or to trade accounts that are not yours;
- use it in any way that breaks the rules of your broker, your prop firm, your exchange, or any law that applies to you.
Each of these is a material breach, and section 14 says what happens then.
7. Delivery
Delivery is digital and immediate. As soon as the payment clears, the license key is issued automatically, emailed to the address you gave at checkout, and placed in your account area together with the download and the setup guide. There is nothing to ship and no waiting period.
Give a correct email address: it is where the key and the account access go. If the email has not arrived within a few minutes, check the spam folder and then open a ticket through the contact form with your order reference. The key exists in your account either way, and we can resend it.
You accept that delivery begins immediately upon purchase. That immediacy is why the refund policy works the way it does, and section 10 summarizes it.
8. Price and taxes
Prices are shown on the pricing page in US dollars, and the price displayed at the moment you complete checkout is the price of your order. The current price of TSOPEN is $997 for a single seat, plus the one-time addition for each extra seat shown at checkout. We can change prices at any time; a change never applies backward to an order already paid.
Any sales tax, VAT, GST, import duty, withholding or other charge that applies where you are is added at checkout where we are required to collect it, and is otherwise your responsibility. If your bank or card issuer charges a currency conversion or foreign transaction fee, that is between you and them; the amount we receive is the price of the order, and any such fee is not refundable by us.
9. Payment and installment plans
Payments are processed by Stripe. Card details are entered on Stripe's own secure checkout and are never seen, handled or stored by us: what reaches our systems is your name, your email, the amount, and confirmation of whether the payment succeeded. Stripe's own terms and privacy policy apply to the payment itself, and our privacy policy explains what we keep on our side.
Where an installment plan is offered at checkout, it splits the same total price into a fixed number of scheduled payments charged automatically to the card you used. It is not a subscription and it does not increase the price. Three things follow from it:
- the license is issued and the software is downloadable from the first payment, so you are using the product before you have finished paying for it;
- if a scheduled installment fails or is not paid, the license is suspended until the balance is resolved: the key stops activating and the software stops running, without any other notice than the failed payment itself and the emails Stripe and we send about it;
- as soon as the outstanding installment is paid, the license is reactivated, on the same key and the same seats, with nothing to reinstall.
A card that expires or a bank that declines is usually a five-minute fix through your account area or a ticket. If a plan is abandoned entirely, the license stays deactivated and the payments already made are not refunded, since they paid for the use you already had. Chargebacks and payment disputes also suspend the license while they are open; if you think something has been charged wrongly, open a ticket first. That is faster than a dispute and it does not put your key on hold.
10. Refunds
Because the license key and the software are delivered immediately, sales are final once the key has been issued, except in the specific cases we list: a duplicate charge, a technical failure that prevents installation and cannot be resolved by support, or a purchase reported as a mistake before the key has been used. The refund policy sets out those cases, how to ask, the review window, and how the money comes back. It forms part of these terms, and a refunded order deactivates the license it paid for.
Nothing in these terms affects any right you have under a mandatory consumer protection law that applies to you and that a contract cannot override.
11. What you are responsible for
You run the software, on your machine, in your account, with your money or a funded account you contracted for. That means you are responsible for:
- the computer, the internet connection, the power and the platform staying up during the trading window, and for any VPS you choose to use;
- choosing your broker, your data feed and your account size, and for the contracts and quantities the software is configured to send;
- complying with the rules of any proprietary trading firm whose account you use, including its loss limits, drawdown rules, permitted software and payout conditions (those are its contract with you, not ours);
- watching your own account well enough to notice if something is wrong, and knowing how to flatten a position and disable a strategy in NinjaTrader 8;
- your taxes, your reporting and your own compliance with the law where you live, including whether automated trading and futures trading are permitted for you at all;
- keeping your license key and account email secure, and telling us through a ticket if you think either has been compromised.
12. Disclaimer of warranties
The software and this site are provided "as is" and "as available", with all faults. To the fullest extent the law allows, we disclaim all warranties, express or implied, including any implied warranty of merchantability, fitness for a particular purpose, title and non-infringement.
Specifically, and without limiting that: we do not warrant that the software will be profitable, that it will reproduce the backtested results published on this site, that it will run without interruption or error, that it will be compatible with every future version of NinjaTrader 8, Windows, a broker platform or a data feed, or that any defect will be fixable. Trading futures involves a substantial risk of loss. You can lose money using this software, including more than you initially put in, and you accept that risk knowingly.
13. Limitation of liability
To the fullest extent permitted by law, our total liability to you for any and all claims arising out of or relating to the software, this site or these terms is limited to the amount you actually paid us for your license.
We are not liable for trading losses, lost profits, lost opportunities, missed trades, failed or breached prop-firm evaluations, evaluation or account fees, data loss, business interruption, or any indirect, incidental, special, consequential or punitive damages, whether the claim is in contract, tort, strict liability or anything else, and whether or not we were told such damages were possible.
Some jurisdictions do not allow the exclusion of certain warranties or the limitation of certain damages. Where that is the case, the exclusions and limits above apply only as far as that law allows, and nothing here excludes liability for fraud, fraudulent misrepresentation, or anything else that cannot lawfully be excluded.
14. Suspension and termination
Your license ends automatically if you materially breach these terms: sharing or reselling a key, tampering with the activation system, reverse engineering the software, or using it to trade accounts that are not yours. In practice we suspend the key, tell you through a ticket why, and give you the chance to explain if it looks like a misunderstanding, because sometimes it is.
We may also suspend a license while an installment is unpaid, while a payment dispute is open, or where we are legally required to. On termination for breach you must stop using the software and delete every copy of it, no refund is due, and we keep whatever remedies the law gives us. You can stop using the software whenever you like; that ends the license but does not create a right to a refund outside the refund policy.
15. Changes to these terms
We may update these terms: for a new payment method, a new feature, a new legal requirement. The current version is always the one published at this address, with the date it last changed at the top. Changes apply to orders placed after they are published, not backward to an order you already paid for: the version in force when you bought is the one that governs your purchase. If a change is material and affects licenses already issued, we will say so by email to the address on the account.
16. Governing law and disputes
These terms, and any dispute or claim arising out of them or out of the sale or use of the software, are governed by the laws of ________________________, without regard to its conflict-of-law rules. Any dispute that cannot be resolved through a support ticket shall be brought exclusively before the courts of ________________________, and both parties submit to that jurisdiction. The United Nations Convention on Contracts for the International Sale of Goods does not apply.
17. Everything else
If any part of these terms turns out to be unenforceable, that part is trimmed to the minimum that makes it valid, or removed, and the rest stays in force. If we do not enforce something immediately, we have not waived it. You may not assign or transfer your license or these terms; we may assign them to a successor if the business is sold or reorganized, with your rights unchanged. Notices to you go to the email address on your account; notices to us go through the contact form. These terms, together with the legal notice, privacy policy, cookie policy, risk disclosure and refund policy, are the entire agreement between us and replace anything said before, anywhere, by anyone.