Most traders spend months staring at candlestick charts before someone asks them a simple question: where did that candle actually come from? The price moved — but was it one large institutional order or hundreds of retail traders piling in? The chart shows the result. Order flow shows the cause.

Order flow is the real-time stream of buy and sell orders entering the market. Every price move is driven by an imbalance — more aggressive buyers than sellers, or vice versa. When traders talk about "reading order flow," they mean watching that imbalance as it happens, not after the candle has closed and the moment has passed.

CONCEPTOrder flow measures the pressure behind price — aggressive buyers lift the ask, aggressive sellers hit the bid.
WARNINGLagging indicators show where price was — order flow tools can still mislead if volume context is ignored.
KEY IDEAA candle closing up doesn't mean buyers were dominant — delta (buy volume minus sell volume) tells the real story.

The core concept to grasp is delta. Delta is simply buy-side volume minus sell-side volume over a given period. A candle that closes higher but has negative delta — meaning more volume hit the bid than lifted the ask — is sending a warning. Price went up, but sellers were the aggressive party. Experienced traders treat that as a potential exhaustion signal, not confirmation of strength.

Candle Delta +Price Neg Volume Close up Sellers dominant Divergence

Here is a concrete example. Imagine the ASX 200 futures contract trades 2,400 contracts during a single one-minute candle. The candle closes 3 points higher. But the footprint data shows 1,600 contracts were sold aggressively at the bid versus only 800 lifted at the ask. Delta is minus 800. Price rose because passive buy orders absorbed the selling — but the aggression was bearish. Traders watching order flow see a market running out of upward fuel, not confirming it. For deeper background on how these mechanics sit within broader market structure, resources like Investopedia's order flow explainer, the Wikipedia entry on order flow trading, and Investopedia's volume analysis overview offer solid grounding without requiring a Bloomberg terminal.

The chart never lies — but it only tells half the story. Order flow tells you who was fighting, and who was winning.

This content is for educational purposes only and does not constitute financial product advice. Past performance is not indicative of future results. Profit Logic Ltd (ACN 688 669 936) accepts no responsibility for errors or omissions in this content or anywhere on this website. Always seek advice from a licensed financial adviser before making investment decisions.