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What is a fast feed in arbitrage trading?<\/h3>\n
A fast feed is a low-latency market-data stream used as the reference price in arbitrage. It delivers price updates from upstream liquidity with minimal delay, so you can detect when a slower broker or exchange quote is momentarily stale and trade against it. The gap between the fast reference feed and the slower target quote is the arbitrage edge.<\/p>\n
How fast does a feed need to be for latency arbitrage?<\/h3>\n
Fast enough to beat your specific target, not fast enough to beat the whole market. If your broker lags by tens of milliseconds, a low-millisecond FIX API feed on a nearby VPS is sufficient. Consistency (low jitter) and full tick granularity often matter more than a marginally lower average latency.<\/p>\n
What is the difference between a reference feed and a broker feed?<\/h3>\n
The reference feed is your fast, upstream read on the market’s true price. The broker feed is the quote stream from the venue you trade on, which lags because of aggregation, distance, or throttling. Latency arbitrage exploits the moments when the broker feed has not yet caught up to the reference feed.<\/p>\n
Can I use my trading platform’s own feed as the reference?<\/h3>\n
Usually not. A standard retail platform’s aggregated feed is typically the slow side of the gap you are trying to detect \u2014 it is the target, not the reference. You generally need a separate, faster feed (such as a FIX API or direct venue feed) to have anything to compare against.<\/p>\n
What is the best fast feed for crypto arbitrage?<\/h3>\n
For live execution, a direct exchange-native websocket feed is usually fastest, because there is no aggregation layer between you and the matching engine. Consolidated crypto data APIs are better for research, backtesting, and monitoring than for live trading, since normalization adds delay. Cross-exchange strategies often run several native feeds in parallel.<\/p>\n
Why do jitter and timestamps matter as much as latency?<\/h3>\n
Jitter (variation in delay) can make your logic fire on gaps that have already closed, and inaccurate timestamps corrupt the alignment between reference and broker ticks. A consistent, source-timestamped feed produces reliable measurements; a faster but erratic or arrival-timestamped feed produces phantom opportunities.<\/p>\n
How do I know my fast feed is really beating the broker?<\/h3>\n
Measure the live gap between them. For your exact broker, quantify how large the divergences are, how long they last, and when they occur. A free forex arbitrage scanner<\/a> that logs real reference-vs-broker divergences with timestamps is the most direct way to confirm the edge before spending on a feed or infrastructure.<\/p>\n<\/p><\/div>\n
\nThe Bottom Line<\/h2>\n
The fast feed is not a supporting detail of arbitrage \u2014 it is the strategy’s foundation. A clean, consistent, well-timestamped, unthrottled feed, hosted close to the liquidity it references, is what turns “there should be a gap” into “here is the gap, measured.” Everything downstream \u2014 thresholds, execution, risk \u2014 is built on top of that data layer, and none of it can compensate for a feed that is slow, throttled, or no faster than the broker it is meant to beat.<\/p>\n
As with the strategy overall, the decisive move is measurement before spending. Before you pay for any feed, confirm that a fast reference genuinely leads your target broker, with hard data on the size, duration, and timing of the gaps.<\/p>\n
\u2192 Open the free forex arbitrage scanner<\/a><\/strong> \u2014 real broker latency data, 365-day history, open methodology, no signup \u2014 and see whether the gap your feed needs actually exists.<\/p>\nThis guide is educational and is not financial advice. High-frequency and arbitrage trading involve significant risk; measured theoretical opportunities do not guarantee tradable or profitable results.<\/p>\n<\/article>\n<\/div>\n
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