Flux Markets

Flux Markets Broker Overview

Flux Markets is a London-based broker for CFDs and spread bets on oil and other energy products, metals and major FX pairs, operated by Onyx Capital Advisory Limited, a UK company authorised by the Financial Conduct Authority (FCA) under firm reference number 822509. It belongs to Onyx Capital Group, and the same flux.live website carries the group's energy market data and institutional trading products. Trading runs on MetaTrader 5, with FX pairs dealt electronically and oil products by phone. The earlier brand, Onyx Markets, is still listed on the FCA register as a trading name of the same company, and its domain, onyxmarkets.co.uk, now redirects to flux.live.

Flux Markets Regulation and License

Onyx Capital Advisory Limited holds FCA authorisation under firm reference number 822509, effective from 3 January 2019, and its Terms of Business name Flux Markets as the trading name of its CFD and spread betting business. WIKILIX confirmed the authorisation on the FCA's Financial Services Register on 24 October 2026: the firm is shown as authorised, with no restrictions and no end date, and Flux Markets is listed among its trading names from 13 June 2025. The permissions on the register include dealing in investments as principal and as agent, arranging deals in investments, managing investments, safeguarding and administration of assets, and advising on investments other than pension transfers and opt-outs, for retail as well as professional and eligible counterparty clients, and the investment types named include contracts for differences, rolling spot forex contracts and spread bets. The register gives the group's corporate site, onyxcapitalgroup.com, as the firm's website rather than flux.live.

Is Flux Markets Regulated?

Yes. Flux Markets is regulated in the United Kingdom by the FCA through Onyx Capital Advisory Limited, whose authorisation covers retail clients. For retail clients, the broker's documents describe negative balance protection, client money held in segregated client bank accounts with Financial Services Compensation Scheme (FSCS) cover up to 85,000 GBP, and the right to take an unresolved complaint to the Financial Ombudsman Service (FOS). Professional clients and eligible counterparties have no negative balance protection, and the Costs and Charges document lets Flux charge interest at SOFR plus 60 percentage points a year on a negative balance or an unmet margin call. The Client Categorisation Policy says professional clients cannot claim on the FSCS or refer complaints to the FOS, while the Complaints Process says some professional clients can use the FOS, and professional clients who opt into a title transfer collateral arrangement no longer have their money held as segregated client money.

Onyx Capital Advisory Limited

Onyx Capital Advisory Limited is the company that contracts with Flux Markets clients under the Flux Markets Terms of Business. UK Companies House shows it as company number 11472304, incorporated on 19 July 2018, with its registered office at 95 Cromwell Road, Second Floor, London SW7 4DL. The office address on the Flux Markets website is 114a Cromwell Road, Fourth Floor, London SW7 4ES. Onyx Capital Group Limited, which issues the privacy policy on the website, lists Onyx Capital Advisory Limited among its subsidiaries.

Is Flux Markets Safe?

Flux Markets is run by an FCA-authorised UK company, but regulation is not a guarantee, and the broker's own documents carry terms worth reading before funding an account. Its Order Execution Policy says Flux acts as principal and market maker on CFDs and spread bets, so clients deal with Flux Markets rather than in the underlying market, while its CFD trading page speaks of 'direct access to deep liquidity' with 'zero middlemen'. Its CFD FAQ says client funds are protected from any right of set-off by Flux, yet clause 4.8 of the Terms of Business lets Flux stop treating as client money any amount a client owes it, once due, and apply that money to the debt.

The Terms of Business (26 June 2026) also let Flux retain amounts gained on trades where it reasonably suspects Improper Use and, where it believes platform latency was unfairly exploited, void all trades, return only the balance without their profit or loss and close the account. A statement becomes conclusive and binding unless the client objects in writing within two business days, and Flux's total liability under the Terms is capped at the client's deposits minus withdrawals, apart from liabilities the law does not allow it to exclude. The FCA register also names a clone of this firm, Onyx Capital Pro at onyxcapitalpro.com, added on 23 January 2026.

Flux Markets Account Types

Retail and professional clients choose between two account types, CFDs and Spread Bets, while corporate clients are offered standard CFDs only. CFDs cover outright oil products, bio fuel products, metals and 10 major FX pairs, and spread bets cover oil contracts and the same FX pairs. Accounts are opened as individual or corporate accounts, with joint accounts at Flux's discretion, and a demo account offers virtual money, electronic execution on all symbols and prices delayed by 10 minutes. The first deposit is set by margin rather than by a fixed amount: under the Terms of Business an account can trade once the client has passed the acceptance process and deposited the initial Margin Requirement. The Terms of Business exclude anyone located in, incorporated in or resident in the USA or Belgium.

Flux Markets Spreads, Commissions and Fees

Spreads are variable on all products, and Flux charges half of the prevailing spread when a position opens and half when it closes; some products traded only manually carry guaranteed maximum spreads for up to 1 lot per contract per minute. Spread bets carry no commission and the CFD cost list names none, although the Terms of Business say that for certain products the spread may contain an element of charge or commission, and the Costs and Charges document (26 June 2026) allows a transaction fee per lot for certain professional clients, at a rate notified in writing. Overnight funding on forex is 1.00% a year plus the tom-next adjustment. Perpetual commodity contracts carry a roll adjustment plus a 3.00% annual fee, charged daily whether the position is long or short, while the broker's CFD FAQ and spread-betting page say the overnight fee is charged only on FX contracts. Products priced in a currency other than the account's carry a 50 basis point conversion charge, and there is no fee for using the MT5 platform.

Flux Markets Leverage

Leverage is set through margin. For retail clients, the tiered margin document (last updated 14 January 2026) starts at 3.33% on the 10 major FX pairs, equivalent to 30:1, 5% on spot gold (20:1) and 10% on spot silver and oil outrights (10:1), with margins rising to between 15% and 25% on the largest positions. Professional clients start from first-tier margins of 0.45% on FX and spot gold, 1.8% on spot silver, 3% on Brent and 5% on other oil outrights, while the CFD trading page advertises professional margins starting at 1.35% for commodities. Flux emails a margin call when equity falls below 100% of used margin and again at 75%, and closes positions, biggest loser first, below 50%; its Terms of Business let it change margin requirements at any time, and the email about a liquidation may arrive after the positions are closed.

Flux Markets Trading Platforms

MetaTrader 5 is the only trading platform Flux Markets offers for CFDs and spread bets, for Windows, Mac, iOS and Android and in the browser at webtrader.flux.live, on the server OnyxCapitalAdvisory-Server. FX pairs are traded electronically, while oil products are dealt by phone during business hours: the client selects the phone icon in the platform and deals through the brokerage team, whose quotes may differ from the indicative prices on screen. Algorithmic trading needs Flux's express consent. Flux 4.0, the group's institutional energy-trading screen, is a separate product available on request, with monthly subscriptions from 400 USD for Flux Markets members clearing bilaterally to 2,000 USD for the software alone.

Flux Markets Deposits and Withdrawals

Accounts are funded by bank transfer or open banking from an account in the client's own name, and Flux does not accept third-party payments, cash, cheques or crypto. The Terms of Business also refer to payment cards, but the site's funding answer names only those two methods. Withdrawals are requested by email to trading@flux.live and ordinarily take Flux up to five business days to process, occasionally longer, after which the bank transfer takes its own time; they normally return by the same method to the same account the money came from. The Costs and Charges document lists no deposit or withdrawal fee, but the Terms of Business reserve charges set out there, and the client's own bank may charge for the payment or for converting currency.

Flux Markets Support

Client services for CFD and spread-bet clients are on +44 20 3097 5000 and at trading@flux.live, and the contact page also lists +44 203 981 2790 and separate addresses for sales and general queries. There is no live chat. The Terms of Business make English the language of all communications and define the firm's Business Hours as 8 a.m. to 6 p.m. on UK business days. Complaints go to the Legal and Compliance department at compliance@onyxcapitaladvisory.com, which promises a full written response within eight weeks, after which retail clients can refer the complaint to the Financial Ombudsman Service within six months of that response.

Flux Markets Pros and Cons

The main strengths:

• FCA authorisation for Onyx Capital Advisory Limited, confirmed on the register and covering retail clients.
• Segregated client money, stated FSCS cover and negative balance protection for retail clients.
• MetaTrader 5 on desktop, mobile and in the browser.
• Detailed published cost and margin documents.

The main limitations:

• A narrow range of oil, bio fuel, metals and 10 FX pairs.
• Oil products are dealt by phone rather than on screen.
• Flux acts as market maker, and its terms let it retain gains or void trades in defined cases.
• Funding only by bank transfer or open banking, with withdrawals requested by email.
• The broker's own pages disagree on whether commodity positions carry an overnight fee.
• Not available to anyone located in, incorporated in or resident in the USA or Belgium.

Flux Markets Review and Assessment

Flux Markets is an FCA-regulated specialist broker for traders who want CFD or spread-bet exposure to oil and related energy markets, run by a London company within an energy-trading group and built on MetaTrader 5. It publishes its costs and margins in detail, but its range is narrow, its oil products are dealt by phone and it is the counterparty to every trade as market maker. Before funding an account, check which protections apply to your client category and read the Terms of Business clauses on voided trades, retained gains and the two-business-day window to dispute a statement.