The three costs: spread, commission, swap

The spread is charged inside the price. When you buy EUR/USD, you pay the higher of the two prices on the screen. When you sell, you receive the lower one. Nobody sends you an invoice for it, because it is already gone by the time the trade opens.

Commission is charged outside the price. It appears as a separate line on your account statement, usually when the trade closes. Some account types carry no commission at all, and those accounts normally have a wider spread instead. The broker is paid either way, so compare the two totals rather than the headline spread alone.

Swap is charged for time. A position held past the broker's daily cut-off point is rolled into the next day, and a swap is added to or subtracted from your balance. The rate depends on the two currencies in the pair and on whether you are long or short. It can be a credit, but for many pairs and directions it is a cost.

The three charges land in different places, so a single glance at the chart will not show them. The spread is in the price, commission is on the statement, and swap is in the balance history. You need all three before the total means anything.

The spread and commission are known when you click, but they are quoted in the currencies of the pair and of the broker's fee. Converting them to naira uses an exchange rate that moves. The figure you calculate before the trade is therefore an estimate, not a locked amount.

Swap adds a second source of drift. The rate your broker applies is set for that day and can change. Holding for one night and holding for ten nights are different costs, and the second cannot be read off the first. Check the contract specifications for the pair, which state how swap is calculated and when it is applied.

There is also the matter of size. Costs scale with the number of lots. Two standard lots carry twice the spread cost and twice the commission of one. A small account trading a large size pays the same charges as a large account, which is why cost per lot matters more than cost per trade.

None of this makes the costs unpredictable in kind. It makes them variable in amount. You can still decide whether a trade is worth taking, as long as you use a naira figure that reflects today's rates rather than one you memorised months ago.

Trading platforms display the live spread and often a running profit or loss for an open position. That running figure usually includes the spread already, because it is calculated from the price you would get if you closed now. It may not include commission that has not yet been booked.

Swap is normally visible in the position details, sometimes under a heading such as rollover or interest. On some platforms it is only shown after the daily cut-off has passed. If you cannot find it, the contract specifications document is the reliable place to look, and your broker's support desk can confirm the current rate.

The account statement is the clearest record. It lists commission and swap as separate entries, with dates. Reading one statement after a week of trading teaches more about your real costs than any calculator, because it shows what was actually charged rather than what was advertised.

A platform that shows a very tight spread is not necessarily cheaper. The missing cost may be sitting in the commission line or in a swap rate that is worse than another broker's. Compare the total, in naira, over the holding period you actually use.

A trade has to move far enough to cover its costs before it makes anything. With a spread of 1.2 pips, the price must move 1.2 pips in your favour just to reach break-even, before commission and swap are counted. Commission adds a further distance that the price must travel.

This break-even distance is the practical number to carry in your head. It is not a prediction and it says nothing about whether the trade will work. It simply tells you how much room the market must give you before the position stops being a cost and starts being a result.

Holding overnight lengthens the distance again, because each night adds swap. A trade that looked cheap at the open can become expensive if it is held for a week waiting for a move. If your reason for the trade needs several days to play out, the swap belongs in the original calculation.

The costs-first approach does not tell you which way the market will go. It tells you what you are paying for the chance to find out. That is the part you can control, and it is the part this lesson asks you to write down before you trade.