A spread is the gap between the price at which a platform will sell an instrument to you and the price at which it will buy it back. On a quote screen for AUD/USD you see two numbers. The lower is the bid, the price at which you can sell. The higher is the ask, the price at which you can buy. The difference is the spread, and it is charged the moment a position opens. On a quote of 0.6640 the bid might read 0.66398 and the ask 0.66402. That gap of 0.00004 is four pips. A pip is the fourth decimal place on this pair, so one pip is 0.0001.

Commission is a separate charge per trade, quoted either per side or per round turn. A round turn means opening and closing, so a commission of A$3.50 per side becomes A$7.00 on a completed trade. Commission is common on raw spread account types, where the spread itself is narrower. Swap is the interest adjustment applied when a position is held past the platform's daily cut-off. It is not a fee invented by the broker. It reflects the difference between the interest rates of the two currencies in the pair, plus a broker mark-up that varies. On AUD/USD you are long the Australian dollar and short the US dollar, so the swap depends on both rates and on the direction of your position.

The three costs behave differently over time. Spread and commission are fixed at entry and exit. Swap accrues for each night the position stays open. A trade closed within the same session pays spread and commission but no swap. A trade held for a week pays all three, and the swap can be larger than the spread on a quiet pair. Before you open any position, find where the platform shows the spread in pips, the commission per side, and the swap rate for long and short. If you cannot find all three, you are not ready to size a trade.

Account types change which cost is larger, not whether a cost exists. A standard account usually bundles the cost into a wider spread and charges no separate commission. A raw spread account shows a narrower spread and adds a commission per side. A cent account lets you trade in smaller position sizes, which reduces the money at risk per pip but does not reduce the spread or commission per pip. The total cost per pip is what matters, and it is the spread plus the commission converted into pips. If the spread is 1.2 pips and the commission works out at 0.7 pips, your cost is 1.9 pips per round turn. Compare that figure across account types rather than comparing the spread alone.

Holding period decides whether swap enters the calculation. A position closed before the cut-off pays spread and commission only. A position held overnight pays swap for each night. Some platforms charge triple swap on a particular weekday to account for the weekend, so a position held from that day carries three nights of swap at once. Swap-free accounts remove the overnight interest charge, usually in exchange for a wider spread or a fixed administration fee. They suit some holding styles and are expensive for others. The only way to know is to price the same trade under both arrangements.

Scalping, swing trading and position trading sit at different points on this cost scale. A scalper opens and closes many times per session, so spread and commission are paid repeatedly and swap is rarely paid. A swing trader holds for days, so swap is paid and spread is paid once per trade. A position trader holds for weeks, so swap dominates. The lesson order on this route follows that logic. You learn what the costs are, then how swap and swap-free accounts change them, then how account types change them, then how each trading style is affected. Sessions and news come last because they change the spread itself, sometimes by a large multiple, and you need the earlier lessons to judge whether that change is worth trading through.

You will be able to write down the full cost of a planned trade before you place it. That means three numbers in the same unit: spread in pips, commission converted to pips, and expected swap per night multiplied by the number of nights you intend to hold. Add them and you have a cost estimate that is comparable across account types and across holding periods. This is not a prediction of profit. It is a limit on how much the trade must move before it breaks even. A trade with a 1.9 pip cost needs a move of more than 1.9 pips in your favour before any gain exists.

You will also be able to tell when a cost is unusually high. Spreads widen around scheduled news releases and at the daily rollover, and they widen more on some pairs than others. A wider spread is not automatically a reason to avoid a trade, but it is a reason to check whether the planned holding period still makes sense. If you intended to scalp a pair and the spread has tripled, the same trade now needs a much larger move. The calendar lesson shows where to find the scheduled releases so you can plan around them rather than discover them after entry.

Finishing the route does not make trading profitable. It removes one common source of loss, which is paying more in costs than the strategy can recover. Many small accounts lose money steadily to spread and commission without any single large loss. Seeing the three costs as one number makes that pattern visible. After the route you can decide which account type and which holding period fit the way you actually trade, and you can check that decision with arithmetic rather than assumption. The figures you use will come from your own platform, because spreads, commissions and swap rates vary between brokers and change over time.