order flow
Order flow is the steady stream of buy and sell orders moving through a market, showing who wants in, who wants out, and how badly.
In plain English
Think of the queue at a busy Lagos bureau de change on a Friday evening, the day before school fees are due everywhere. Some people are rushing in to buy dollars because they are travelling tomorrow. Others are selling because they just got paid in dollars and need naira for the weekend. The queue itself, who is pushing to the front, who is offering a slightly better rate to jump ahead, tells you something about the mood of the street even before you check the official rate on a screen.
Order flow in the stock market is that same queue, except it is made of buy and sell orders for shares instead of cash. Every time someone wants to buy Dangote Cement or sell MTN Nigeria shares on the NGX, that order joins a flow of similar orders arriving every second from ordinary investors, big fund managers, and computers trading automatically.
Watching order flow closely can tell a trader things a simple price chart cannot. If a huge wave of buy orders is arriving for a stock but the price barely moves, that hints at a seller calmly absorbing all that demand, perhaps an institutional investor offloading a large position bit by bit so as not to spook the market. If sell orders suddenly flood in and the price drops fast, it suggests panic or fresh bad news rather than calm profit taking.
On the London Stock Exchange, order flow data is a serious business. Big banks and trading firms study it in real time to guess where prices are headed in the next few minutes, sometimes even paying for faster access to that flow so they can react before everyone else.
For the ordinary Nigerian investor, whether at home or sending money back from abroad to buy shares through a local broker, you will rarely see raw order flow yourself. But understanding that it exists explains why prices sometimes move sharply for no obvious news reason. Somewhere behind the scenes, a flow of orders shifted, and the price simply followed.
A trader notices that GTCO shares have received an unusually large flow of buy orders all morning, worth over ₦500,000,000 in total, yet the price has only crept up by ₦2. This tells her a big seller is likely matching that demand calmly, and she decides to wait before buying in herself.
Questions people ask
Can an ordinary retail investor see order flow directly?
Rarely in full detail. Most retail brokers in Nigeria and the United Kingdom show you the current best price and maybe a few levels of depth, but the deep, real time order flow data is usually reserved for institutional traders and firms who pay for that access.
Is order flow the same thing as trading volume?
Not quite. Volume tells you how many shares changed hands over a period, while order flow tells you the sequence and direction of the orders that created that volume, which side was more aggressive, and how the balance between buyers and sellers shifted moment to moment.
Why does order flow matter if I am a long term investor rather than a short term trader?
For long term investing it matters less day to day, but understanding it helps you stay calm when a stock you hold suddenly swings on no obvious news. Often it is simply a temporary imbalance in order flow, not a change in the company's actual value.
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