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Roundup: DOM, tick volume and order flow in retail FX, what you can actually read

Optimize MetaTrader 4, MetaTrader 5, cTrader, and TradingView for speed. Discuss Level II Market Depth (DOM), custom hotkeys, and volume indicators.
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Fairman
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Roundup: DOM, tick volume and order flow in retail FX, what you can actually read

Post by Fairman »

Roundup: DOM, tick volume and order flow in retail FX, what you can actually read

Order flow tools come up a lot in the indicators board, usually with a lot of hope attached. Seven threads look at what retail forex traders can really see in a DOM, tick volume and tick charts. Read together they're realistic without being dismissive, so here's the combined version.

What the DOM in spot FX actually is

The depth of market thread starts with the key point. Forex has no single order book. The depth you see in MT5 or cTrader is your broker's own liquidity pool or aggregated feed, not the market. A reply found it mostly useless for direction but helpful for seeing how thin things got at certain times. Another reply suggests futures depth if you want a real order book for a currency, while remembering futures are only one slice of total volume.

The order flow thread makes the same point about third-party tools. If a spot FX product claims to show where the banks are positioned, ask what feed it's built on. That question rarely gets a satisfying reply.

What it's good for

Three threads find practical uses, and none of them is predicting direction:
  • Price impact. The order size thread shows how to read it: if 3 million is available at the best ask and you send 5 lots, part fills at worse levels. For larger orders, the DOM gives you an idea of slippage before you click.
  • Liquidity behaviour. The cTrader first impressions thread, three weeks on EURUSD and gold between 07:00 and 10:30 London, expected to see where size was sitting to lean on it for entries. What it actually gave was a much clearer picture of how liquidity behaves around the open and releases.
  • Study material. The DOM screenshots thread captures the book on EURUSD shortly after 08:00 and again around 09:30 on calm days, comparing how quickly top-of-book size refreshes. The sample was still too small for rules, which that thread said plainly.
Tick volume

The tick volume thread explains that most retail platforms count price changes, not currency traded. It tends to correlate with real activity, so it gives hints, but it's broker-specific. A reply in the order flow thread notes tick volume from different brokers can look quite different for the same hour, so it's useful for comparing your own broker across sessions, not as a market-wide number.

Two replies add useful refinements. Compare against the same time of day rather than the last twenty bars, because the first M5 candles after the London open nearly always carry high tick volume, and that tells you nothing special. And for a proxy of real EURUSD activity, CME euro futures volume works, with the caveat that the front contract changes quarterly, so volume migrates from one expiry to the next around roll dates.

Tick charts aren't portable

The tick bars thread explains why a 233-tick chart looks different everywhere. Each broker aggregates from different liquidity providers and filters updates differently. Some send every change, others throttle. During news, one broker might produce three times as many ticks as another. So a tick-chart setup that works on one feed may not translate to another.

Overall

Retail order flow tools are best for execution and context: how thin the book is, how big your order is relative to it, whether activity is unusual for the time of day. The threads agree they're weak for direction.

For those using the DOM on cTrader or MT5, has it changed how you enter, or mostly how you size and time orders?

Threads this pulls from
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FXS Prop Desk
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Re: Roundup: DOM, tick volume and order flow in retail FX, what you can actually read

Post by FXS Prop Desk »

In spot forex, the DOM shows your broker's or liquidity provider's book, not the whole market, so it can tell you about your own execution but not much about global order flow.

Tick volume is more useful than many people think, as long as it is used for relative comparisons on the same feed. A spike in tick volume at a level, compared with the previous few hours, does show increased activity. It just should not be compared across brokers or treated as traded volume.
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Shadow Trader
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Re: Roundup: DOM, tick volume and order flow in retail FX, what you can actually read

Post by Shadow Trader »

On spot forex, there's no central exchange and therefore no single volume figure. What platforms show as volume is almost always tick volume, the count of price changes within a bar.

That count says how often the broker's feed updated, not how much was traded. A bar with 400 ticks might have been 400 trades of one lot, or four trades of a hundred lots each. The platform can't tell the difference.

Plenty of research shows tick volume correlates reasonably well with real volume over longer periods and within the same feed. That's useful. But a scalper works on short windows, where the correlation gets noisy and feed-specific.

The practical problem is that tick count depends on the broker's filtering, the number of liquidity providers aggregated, and even the platform version. Two brokers show different volume bars for the same minute, and the same broker can show different ones after a server change. A strategy that uses a volume threshold, such as "enter only if volume exceeds 150 ticks," is really using a threshold on the broker's feed settings.

Volume-based indicators built on tick volume can still serve as a rough activity gauge, which is a legitimate use. Treating them as order flow evidence is a stretch.

Better options exist for anyone who wants real participation data. Futures volume from the currency contracts on the CME gives a real, though partial, view of traded size. Some brokers also publish their own client volume, which describes only that broker's customers.

A reasonable check is comparing a broker's tick volume with futures volume over a few weeks of one-minute bars. The correlation is usually positive but loose, and it tends to drop at the busiest moments, when quote updates and real trades diverge most.

Has tick volume on a fast chart ever given a reliable signal, or does it mostly confirm what price already showed?
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