Why Your Own Price Feed Matters (or When to Plug In Your Own)
Your price feed is the quiet engine behind every quote, chart and stop out on your platform. Here is what a forex price feed for brokers is, how it differs from a liquidity provider, and how to judge quality.
EVO PlatformsTrading platforms9 min readClients judge a brokerage in the first few seconds on the trading screen: do the prices move naturally, do they match what traders see elsewhere, and do orders fill where expected? All of that depends on one component most founders think about last: the forex price feed for brokers that streams quotes into the platform.
This article explains what a price feed is, how it differs from a liquidity provider, which quality factors actually matter, why the feed is especially important for B-book brokers, and when it makes sense to plug in your own feed instead of using the one bundled with your platform.
Key takeaways
- A price feed streams the bid and ask quotes that drive every chart, fill, P&L figure and stop out on your platform.
- A price feed supplies prices; a liquidity provider also executes orders on an external market. A broker that executes in-house needs, above all, a quality feed.
- Judge a feed on latency, symbol coverage, uptime and support for spreads or markups per group, not just its price.
- In a B-book model the feed is effectively your execution price, so its quality directly affects trust and risk.
- Use a built-in feed to launch fast; plug in your own when you already have a data provider, need niche symbols or want one source across all your tools.
What is a forex price feed for brokers?
A price feed, also called a market data feed, is a continuous stream of bid and ask prices for the instruments your clients trade: forex pairs, metals, indices, crypto, energies and stocks. The trading platform receives these ticks in real time, usually over a protocol such as WebSocket or FIX, and uses them to display quotes, draw charts, calculate floating profit and loss, and trigger pending orders, take profits, stop losses and stop outs.
In other words, the feed is not just what clients see. It is the reference your entire risk and accounting system runs on. If a price is wrong, delayed or missing, every calculation that depends on it is affected.
What a real-time price feed typically delivers
- Bid and ask quotes for each symbol, updated many times per second in liquid markets.
- Timestamps so the platform can order ticks and detect stale data.
- Symbol metadata such as digits, contract size and trading sessions (sometimes configured on the platform side instead).
- Historical data for charts, either from the feed provider or stored by the platform over time.
Liquidity provider vs price feed: what is the difference?
These two terms are often mixed up, but they serve different purposes. A price feed gives you prices. A liquidity provider (LP) gives you prices *and* lets you execute trades against them, so client orders can be passed to the market.
| Price feed | Liquidity provider | |
|---|---|---|
| Main purpose | Supplies real-time quotes | Supplies quotes and executes orders |
| Used for | Display, charts, P&L, B-book execution | Passing client orders to an external market |
| Typical cost basis | Subscription or per-symbol data fees | Spreads, commissions or volume-based terms |
| Onboarding | Usually simpler | Usually requires due diligence, margin and agreements |
| Who needs it | Every broker | Brokers that pass some or all flow to the market |
For a broker that executes client trades in-house, the price feed is what really matters: it sets every quote, fill and stop out, and your spreads are built on top of it. That is why the feed and your risk tools should live in the same system.
Market data feed quality: the factors that matter
Not all feeds are equal. When you evaluate a market data feed, look at these factors rather than only the price of the subscription.
Latency
Latency is the delay between a price changing in the market and that change reaching your platform. High latency creates stale quotes, which latency-arbitrage traders can exploit by trading against old prices. For most retail brokers, consistency matters as much as raw speed: a feed that is usually fast but occasionally freezes for seconds is more dangerous than one that is steadily quick.
Symbol coverage
Your feed must cover every instrument you want to offer: majors, minors and exotic forex pairs, gold and silver, the main indices, popular crypto, oil and gas, and possibly stocks. Gaps mean you cannot list products clients ask for, and adding a second feed just for a few symbols adds cost and complexity.
Uptime and stability
If the feed goes down, trading effectively stops, and positions can be valued against stale prices. Ask providers how they handle disconnections, whether there is failover, and how quickly stale symbols are detected and flagged.
Spreads and markups per group
The raw feed is only the starting point. Brokers usually apply their own spreads or markups, and often set different conditions for different client groups, for example a tighter spread for VIP accounts. Your platform and back office need to support spread control at the symbol level and ideally per group of clients.
Why the feed matters even more for B-book pricing
In a B-book model, the broker takes the other side of client trades instead of passing them to the market. That means your price feed is not just a display layer: it is effectively the execution price. Every fill, every stop loss and every stop out is calculated against the prices you stream.
This has several consequences for B-book pricing:
- Fairness and trust: if your quotes drift noticeably from the wider market, clients notice, complain and leave. A clean feed protects your reputation.
- Exposure to toxic flow: stale or delayed prices invite arbitrage strategies that systematically trade against outdated quotes.
- Dispute resolution: when a client disputes a stop out, you need reliable price history to show what the market was doing at that moment.
- Risk management: your back office monitors exposure using the same prices, so bad data leads to bad risk decisions.
Because the feed carries this much weight in a B-book model, it should be built into the platform, monitored continuously and configurable from your back office through spread control, limits per symbol and leverage settings.
Built-in feed or your own: how to decide
Most white label platforms include a built-in feed, which is the simplest way to launch: there is no separate contract to negotiate and the symbols are already configured. But there are good reasons to plug in your own feed in some situations.
Stick with the built-in feed when
- You are launching a new brokerage and want to go live quickly.
- The built-in symbol list covers your product offering.
- You price and execute client trades in-house and want full control of spreads.
- You want one provider responsible for the whole stack and its monitoring.
Plug in your own feed when
- You already subscribe to a data provider and want the same prices across all your tools.
- You need niche instruments or regional stocks the built-in feed does not cover.
- Your partners require pricing from a specific source.
Before you plug in an external feed, confirm the integration method, how symbols are mapped, who monitors the connection and what happens if it drops. Integrations like this are usually handled as custom development.
Questions to ask any real-time price feed provider
- 1Which symbols are included, and can new ones be added on request?
- 2How is data delivered (WebSocket, FIX, other), and what latency should we expect?
- 3What uptime do you target, and how are outages detected and communicated?
- 4How is historical data handled for charts?
- 5Can we apply spreads and markups per symbol and per client group?
- 6Can the feed be replaced or combined with our own provider later?
How EVO handles the price feed
EVO Platforms includes a built-in price feed with 250+ real-time symbols, streamed live over WebSocket into EVO WebTrader. Coverage includes 60+ forex pairs, metals, indices such as US30, SPX500, NAS100, GER40, UK100 and JP225, 20+ cryptocurrencies, oil and gas, and stocks. All markets are available as add-ons, and any symbol can be added on request.
If you prefer your own provider, you can plug in your own feed instead. Spread control, limits per symbol, leverage per client and stop-out settings are managed from the EVO back office, and every broker runs on an isolated dedicated VPS with 24/7 monitoring and support.
See the EVO price feed page for the full symbol overview, or explore the EVO WebTrader to see how quotes, charts and orders come together for your clients.
Frequently asked questions
What is a price feed in forex?
A forex price feed is a real-time stream of bid and ask quotes for currency pairs and other instruments. A broker's trading platform uses it to display prices, draw charts, calculate floating profit and loss, and trigger orders such as take profit, stop loss and stop out. It is the reference price for the whole platform.
Is a price feed the same as a liquidity provider?
No. A price feed only supplies quotes. A liquidity provider supplies quotes and executes trades on an external market. A broker that executes client trades in-house mainly needs a reliable price feed, because the streamed price is effectively the execution price.
Do B-book brokers need a price feed?
Yes, and arguably it matters more for them. In a B-book model the broker fills client trades internally, so the streamed price is effectively the execution price. A reliable, low-latency feed keeps quotes fair, reduces exposure to arbitrage on stale prices and gives you a trustworthy history for resolving disputes.
How many symbols should a broker's price feed cover?
Enough to cover everything you plan to offer, usually major, minor and some exotic forex pairs, gold and silver, the main indices, popular crypto and energies, and possibly stocks. EVO's built-in feed covers 250+ symbols and can add any symbol on request.
Can I use my own price feed with a white label platform?
Many white label platforms allow it, but not all. Ask whether external feeds are supported, how symbols are mapped and who monitors the connection. With EVO, brokers can plug in their own feed instead of the built-in one, with the integration handled as part of setup or custom development.
This article is for general information only and is not legal, tax or financial advice.
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