Why volume in forex isn't what you think

The problem with volume in forex

If you've traded stocks before — or even just watched stock charts — you know the volume bar at the bottom of the screen. It tells you how many shares changed hands in a given period. High volume during a breakout? That's confirmation. Low volume on a rally? Suspect.

In forex, that same bar exists. But it doesn't mean the same thing.

Why forex volume is different

Forex is decentralised. There is no single exchange that records every transaction. The market is a network of banks, brokers, hedge funds, and retail platforms. Each one sees only its own flow.

Your broker has no idea what happened at another broker. The Bangko Sentral ng Pilipinas has no obligation to report its interventions in real time. A Singapore bank trading with a Tokyo counterparty never publishes that data.

So when your MetaTrader chart shows a volume bar, what is it actually showing?

Tick volume: the proxy

Most retail platforms display tick volume — the number of times the price changed during a given period. Not the number of lots traded. Not the dollar value exchanged. Just the count of price updates.

If EUR/USD ticked 400 times in one minute, your volume bar shows 400. If it ticked 50 times the next minute, the bar shrinks.

Tick volume is a proxy for activity. When real participation is high, price moves more often. When the market is quiet, ticks slow down.

When tick volume is useful

You can use tick volume relatively:

• A breakout with high tick volume is more credible than one with low ticks.
• A spike in tick volume during London open tells you participants showed up.
• Comparing this hour's ticks to the prior hour can reveal a shift in intensity.

But you cannot use it absolutely. You can't say "this move had strong volume, so it's confirmed" the way you might in stocks.

The trap: stock indicators ported to forex

Many classic indicators — On-Balance Volume, Chaikin Money Flow, Volume-Weighted Average Price — were designed for markets with real volume data. Applying them to forex tick volume is like using a thermometer to measure distance. The math still runs. The result is nonsense.

A Filipino example

Imagine you're watching USD/PHP during a BSP rate decision. Your broker's volume bar spikes. Does that mean the central bank intervened? Maybe. Or maybe your broker's liquidity provider saw a surge in retail orders. Or maybe the feed lagged and caught up all at once.

You don't know. You can't know. The spike tells you something happened, but not what or how much.

The takeaway

Forex volume is a shadow. It hints at activity but never proves it. Use it for context — to compare one period to another, to spot unusual participation — but never treat it as ground truth.

If an indicator relies heavily on volume, ask whether it was built for centralised markets. If yes, be skeptical.

---