COURSE 1 · FOREX FOUNDATIONS · LESSON 2
How Does Forex Trading Work?
One EUR/USD trade, traced from the quote on the screen to the dollars in the account — including the cost most beginner guides leave out.
Updated 2026-09-04 · Educational content · No broker owns this site
Quick answer. Forex trading works by buying one currency and selling another as a pair. You buy at the ask price and sell at the bid; the gap between them is your cost. Your result is the price move in pips multiplied by your position size.
What actually happens when you place a forex trade?
You are not buying “forex”. You are buying one currency and selling another at the same time, in a single click, as a currency pair.
Take EUR/USD at 1.0850. That exchange rate means one euro costs 1.0850 US dollars. The base currency (EUR) is what you are trading; the quote currency (USD) is the price tag.
- Buy EUR/USD — you buy euros, sell dollars. You want the number to go up.
- Sell EUR/USD — you sell euros, buy dollars. You want the number to go down.
Everything else in this lesson is the arithmetic that turns that decision into a number of dollars. If you have not read what forex is, start there.
How do you read a EUR/USD quote?
Your broker never shows one price. It shows two.
The bid is where you can sell. The ask is where you can buy. The gap is the spread, and it is a cost you pay on entry whether the trade works or not.
This is why a trade that closes at exactly the price you opened it is a small loss, not a break-even.
What is a pip worth on one mini lot?
A pip is the standard price step. In EUR/USD it is the fourth decimal: 0.0001.
Its value in dollars depends entirely on how many units you trade:
- You trade 1 mini lot of EUR/USD.
- 1 mini lot = 10,000 units.
- One pip = 0.0001.
- 10,000 × 0.0001 = $1.
So on 1 mini lot, one pip is one dollar. On 1 standard lot (100,000 units) the same pip is $10. On 1 micro lot (1,000 units) it is $0.10. The market moves the same distance in every case — only your size changes what that distance costs you.
Why EUR/USD is the easy one. The pip value comes out in round dollars because the quote currency is the US dollar. On a pair like EUR/GBP the pip value lands in pounds and has to be converted, which is why beginner examples nearly always use a pair ending in USD.
What does one complete EUR/USD trade look like?
Here is the whole thing, start to finish, with every number tied to the one before it.
| Part of the trade | Value | Where it comes from |
|---|---|---|
| Pair | EUR/USD | your choice |
| Direction | Buy (long) | your choice |
| Entry | 1.0850 | the ask, not the bid |
| Size | 1 mini lot = 10,000 units | your choice |
| Pip value | $1 | 10,000 × 0.0001 |
| Exit | 1.0880 | your target |
| Move | 1.0880 − 1.0850 = 0.0030 = 30 pips | 0.0030 ÷ 0.0001 |
| Gross result | 30 × $1 = +$30 | pips × pip value |
| Spread paid | 1 pip = −$1 | bid/ask gap on entry |
| Net result | +$29 | before swap or commission |
Nothing in that table is a prediction and nothing in it is a promise. It is the same six inputs every trade has: pair, direction, entry, size, exit, cost.
What happens when the same trade loses?
Identical arithmetic, opposite sign. You bought at 1.0850 and placed a stop-loss — an order that closes the position if price reaches a level you chose — at 1.0830.
1.0850 − 1.0830 = 0.0020, which is 20 pips. On 1 mini lot that is −$20 before costs.
A stop-loss caps the intended loss; it does not guarantee the exact price in a fast or gapping market. Notice what the 20 pips did not depend on: your opinion, the news, or how confident you felt. It depended on the distance to your stop and your position size — the two things you set yourself. That is the whole subject of risk per trade.
What does leverage change — and what does it not?
Leverage lets you open a position larger than the cash in your account. Your broker sets aside part of the position’s value as margin and lends you the exposure for the rest.
Here is the part beginners miss: leverage does not change the pip value. On 1 mini lot, a pip is $1 whether your account has $200 or $20,000 behind it. What leverage changes is how easily you can open a size that is too big for the account — and then a normal 20-pip move becomes a large percentage of your money.
Our knowledge base sources cap short-term risk at no more than 1% of the account per trade, and describe risk creep — quietly widening from 1% to 5% to hit a monthly target — as the mechanism that ends accounts. Treat leverage as the thing that makes that creep possible, not as a feature.
Long or short: what is the difference?
| Long | Short | |
|---|---|---|
| You click | Buy EUR/USD | Sell EUR/USD |
| You are really doing | buying EUR, selling USD | selling EUR, buying USD |
| You profit if | the number rises | the number falls |
| Example | buy 1.0850, exit 1.0880 = +30 pips | sell 1.0850, exit 1.0820 = +30 pips |
| Entry price used | the ask | the bid |
Shorting sounds strange until you remember there is no single asset to own. Every pair has two sides; selling EUR/USD is simply choosing the dollar over the euro for the length of that trade. The pip maths is identical in both directions.
What should you decide before you click?
Two decisions come before any of the numbers above, and both are about you rather than the market.
Pick a holding period and stay in it. A trade held for hours and a trade held for weeks need different chart timeframes, different screen time and different stop distances. Our knowledge base is blunt about this: the styles are not the problem, mixing them is — opening a short-term trade and then holding it like a long-term investment because it is losing is not a plan, it is a reaction.
Stop trying to predict. You do not need to know where EUR/USD will be tomorrow. You need to know what you will do at specific prices. Replace “EUR/USD has to go up” with “if it trades above X, I will consider a long; if it does not, I do nothing.” Doing nothing is a valid action.
Then fill this in. If any row is blank, the trade is not ready:
| Question | Worked example |
|---|---|
| Which pair? | EUR/USD |
| Buy or sell? | Buy |
| Entry price? | 1.0850 (the ask) |
| Stop-loss price? | 1.0830 |
| Stop distance in pips? | 20 pips |
| Position size? | 1 mini lot |
| What is one pip worth? | $1 |
| Planned loss if stopped? | $20 before costs |
| What does entry cost? | 1 pip spread = $1 |
| Why would I exit? | stop hit, target hit, or the reason for the trade is gone |
Common mistakes beginners make
| Mistake | Why it hurts | What to do instead |
|---|---|---|
| Not knowing the pip value before entering | the loss arrives as a surprise, in a number you never agreed to | work out pip value × stop distance first |
| Treating leverage as buying power | the loss scales with position size, not with your deposit | choose the risk, then let it choose the size |
| Moving the stop further away | converts a planned loss into an unplanned one | accept the level you chose while you were calm |
| Mixing time horizons mid-trade | a day trade becomes an “investment” only because it is red | fix the holding period before entry |
| Forgetting the spread | very short trades need the price to cover the cost before anything is left | include the spread in the plan |
| Entering because price moved fast | speed feels like opportunity; it is usually just volatility | wait for the setup you defined |
The most expensive sentence in beginner trading is “I’ll see what happens.” It almost always means there is no exit plan. The platform will still let you click — that is not the same as the click being a decision.
Frequently asked questions
Is forex trading the same as changing money for a holiday?
No. A holiday exchange is a one-off conversion so you can spend the money. A forex trade is an attempt to profit from the rate changing, and it adds position size, leverage, a spread, a stop-loss and the real possibility of losing money you did not intend to lose.
How much is one pip worth?
It depends only on position size. In EUR/USD one pip is 0.0001, so on 1 mini lot (10,000 units) it is $1, on 1 standard lot (100,000 units) it is $10, and on 1 micro lot (1,000 units) it is $0.10. Work this out before you enter, not after.
Why is my trade losing the moment I open it?
Because you bought at the ask and the platform values your position at the bid. That gap is the spread — on a 1-pip spread with 1 mini lot, you start about $1 down. Price has to cover the spread before the trade is at break-even.
Does leverage make forex more profitable?
No. Leverage changes how much cash is needed to open a position, not what a pip is worth. On 1 mini lot a pip is $1 regardless of leverage. What leverage does change is how easily you can open a position too large for your account, which magnifies losses as well as gains.
Do I have to predict where the price is going?
No. You need a plan for what you will do at specific prices — where you enter, where you are wrong, and where you leave. Deciding to stay out is a valid outcome of that plan, and it is often the right one.
Sources
- FirstPip knowledge base — Trading Styles and Time Horizons (source S002)
- FirstPip knowledge base — Trading Without Prediction (source S002)
- FirstPip knowledge base — Risk Per Trade, the “R” unit (sources S001, S002)
- BIS, “OTC foreign exchange turnover in April 2025”, Triennial Central Bank Survey, 30 September 2025
- ESMA, “ESMA agrees to prohibit binary options and restrict CFDs to protect retail investors”, 27 March 2018 (leverage limits for retail clients)