FIX API and ITCH are both protocols used in electronic trading, but they are built for different jobs. FIX API is a two-way protocol for sending orders and receiving executions; ITCH is a one-way binary market-data feed developed by NASDAQ. This page explains what each protocol does, how they differ, and which one matters for a Forex trader using FIX API Terminal.
Respuesta rápida: FIX API is an order-entry and execution protocol — a trader’s software sends orders and receives fills and order-book information over a two-way session. ITCH is a binary market-data feed protocol from NASDAQ that broadcasts full order-book updates one way, from the exchange to subscribers, and is valued for low bandwidth and low latency. They are complementary rather than competing: ITCH delivers data, FIX delivers orders. Forex brokers expose FIX API connectivity, which is what FIX API Terminal uses; ITCH is mainly a NASDAQ equities market-data feed.
¿Qué es la API FIX?
FIX (Financial Information eXchange) is a messaging protocol for transmitting orders, executions, and trade-related messages between traders, brokers, and liquidity providers. It is a text-based, tag-value protocol and works as a two-way session: the trader’s software sends orders, and the broker returns prices, execution reports, and status messages. In Forex, brokers that support FIX API let advanced traders connect directly to their FIX endpoint. FIX API Terminal uses this connection to place manual and automated trades.
What Is the ITCH Protocol?
ITCH is an application-level binary protocol developed by NASDAQ for disseminating market data. Instead of tag-value text, it encodes messages in binary, which keeps them compact and fast to process. ITCH is a one-way feed: the exchange broadcasts a stream of order-book events — new orders, cancellations, modifications, and executions — and subscribers reconstruct the full order book from those events. Because it shows every individual order, ITCH is often described as a market-by-order feed.
ITCH originated at NASDAQ in 2000, when FIX market-data messages were considered too heavy for efficient bandwidth use, so a lighter binary feed was created. ITCH handles only market data; its order-entry counterpart is a separate binary protocol called OUCH.
FIX API vs ITCH: Key Differences
| Aspecto | API FIX | ITCH |
|---|---|---|
| Primary purpose | Order entry and execution (can also carry market data) | Market-data dissemination only |
| Dirección | Two-way (request and response) | One-way (exchange to subscriber) |
| Message format | Text, tag-value | Binary |
| Carries orders? | Sí | No (OUCH handles order entry) |
| Carries market data? | Yes, but heavier on bandwidth | Yes, full order book, lightweight |
| Human-readable | Relatively readable | Not readable without decoding software |
| Typical market | Multi-asset, widely used in Forex | Mainly NASDAQ equities |
| Diseñado para | Broad interoperability across venues | Low bandwidth, low latency data feeds |
| Counterpart protocol | Self-contained for orders and data | OUCH (order entry) |
Are FIX API and ITCH Competitors?
Not really. They solve different problems and are often used together at the same firm: a trading system might receive prices over an ITCH feed and send orders over FIX or OUCH. Comparing them is less a question of which is better and more a question of which job each one does. ITCH is optimised for streaming large volumes of market data quickly; FIX is optimised for the full order workflow across many venues and asset classes.
¿Qué protocolo es importante para un trader de Forex?
For most Forex traders, the answer is FIX API. Forex brokers that offer direct connectivity expose it through FIX API, not ITCH. ITCH is tied to NASDAQ’s equity market-data infrastructure and is not how a Forex trader connects to a Forex broker. So while ITCH is useful to understand in the wider low-latency trading world, FIX API is the protocol you actually use to trade Forex through a broker.
FIX API Terminal connects to brokers through FIX API. It does not use the ITCH protocol, which is a NASDAQ market-data feed. If your goal is direct Forex broker connectivity, FIX API is the relevant protocol.
Dónde encaja la Terminal FIX API
FIX API Terminal is a Forex trading platform built around FIX API connectivity. It connects to a broker that provides a FIX API account, sends orders and receives prices and execution reports over that FIX session, and supports manual, automated, and semi-automated trading using MQL-based robots. Traders who want the transparency and directness associated with professional protocols can get it through FIX API, without needing exchange-specific feeds such as ITCH.
Preguntas frecuentes
What is the difference between FIX API and ITCH?
FIX API is a two-way protocol for sending orders and receiving executions and order-book information. ITCH is a one-way binary market-data feed developed by NASDAQ. FIX handles the order workflow; ITCH only delivers market data.
Is ITCH faster than FIX?
ITCH is a binary protocol designed to transmit market data with low bandwidth and low latency, so for streaming order-book data it is lighter than text-based FIX messages. They are built for different tasks, however, so it is not a like-for-like speed comparison.
Does ITCH handle order entry?
No. ITCH only disseminates market data. NASDAQ’s binary order-entry protocol is a separate one called OUCH.
Can I trade Forex with ITCH?
Generally no. ITCH is a NASDAQ equity market-data feed. Forex brokers provide direct connectivity through FIX API, which is the protocol a Forex trader uses to place orders.
Does FIX API Terminal use ITCH?
No. FIX API Terminal connects to brokers through FIX API. ITCH is not used, because it is a market-data feed protocol rather than a way to connect to a Forex broker.
What is the difference between ITCH and OUCH?
Both are binary NASDAQ protocols. ITCH disseminates market data, while OUCH is used to enter, modify, and cancel orders. ITCH is the data feed; OUCH is the order-entry channel.
Conclusión
FIX API and ITCH are not rivals but tools for different jobs: ITCH streams market data efficiently in binary form, while FIX API carries the full order workflow in a two-way session. For Forex trading, FIX API is the protocol that matters, and FIX API Terminal is built to use it for direct broker connectivity, manual trading, and automated MQL strategies.
Descarga la plataforma de trading FIX API gratuita Aprende cómo funciona el trading con API FIX