Pairs and quotes: what 1.0850 means

A quote shows two prices: the bid, where you can sell, and the ask, where you can buy. The ask is always the higher of the two. If the bid is 18.4100 and the ask is 18.4102, the gap is two steps in the fourth decimal. That gap is the spread, and you pay it the moment you open a trade. The spread is not a fee added later. It is built into the price you get.

The fourth decimal is the place where the price usually moves during a trading session. On USD/ZAR, one step in that place is 0.0001 rand. That seems tiny, but it has a money value that depends on how many units you are trading. If you trade 20,000 units, one step is worth 20,000 times 0.0001 rand, which equals R2.00. If you trade 100,000 units, one step is worth R10.00. The more units you trade, the more each step costs or earns you.

This is why a two-step move is not trivial. On 10,000 units, two steps are worth R2.00. On 50,000 units, two steps are worth R10.00. The number of steps you count is the same, but the rand value changes with your position size. Always multiply the step value by your units to see the real money. That calculation is the same whether you are opening or closing a trade.

The spread is the difference between the bid and the ask. If you buy at the ask and immediately sell at the bid, you lose the spread. That loss is a real cost, and you can work it out in rand. Suppose the bid is 18.4100 and the ask is 18.4102. The gap is two steps. On 5,000 units, one step is 5,000 times 0.0001 rand, which equals R0.50. Two steps times R0.50 equals R1.00. So the spread cost is R1.00 before any other fees.

That R1.00 is not a charge that appears on a statement. It is already inside the prices you see. When you open a trade, you start from a small loss equal to the spread. To break even, the price must move in your favour by at least that many steps. On 5,000 units, a two-step spread means the price must move two steps just to get back to where you started. This is why checking both prices matters before you click buy or sell.

The exact spread varies between brokers and between account types. Some brokers may round the quoted price, which changes the last digit you see. Others may charge a commission on top of the spread. Spreads can also widen around news times or when the market is quiet. Because these details differ, you cannot assume one broker's spread is the same as another's. Always look at the live bid and ask on your own platform before you trade.

A quote like 18.4100 on USD/ZAR tells you what one US dollar costs in rand. The first currency is the one being priced. The second currency is the one you pay with. So 18.4100 means one US dollar costs 18.4100 rand. If the quote moves to 18.4200, one US dollar now costs 18.4200 rand. The change is 100 steps in the fourth decimal. On 10,000 units, that is 10,000 times 0.0100 rand, which equals R100.00.

The quote always has two parts: the bid and the ask. The bid is the price at which the broker will buy from you. The ask is the price at which the broker will sell to you. If you want to buy USD/ZAR, you pay the ask. If you want to sell, you receive the bid. The difference between them is the spread. You never get to trade at the midpoint unless the broker offers that, which is rare.

When you see a quote, do not read it as a whole number. Read it as a price with a fixed number of decimal places. On USD/ZAR, there are four decimal places. The last one is where the price ticks. Each tick is a step. Your profit or loss is the number of steps the price moves in your favour or against you, multiplied by your units and by 0.0001. That is the money value of a step. Keep that calculation in mind every time you look at a chart.