Money from other
countries, explained
from scratch.

Imagine your class swaps snacks at lunch. You have an apple, your friend has a chocolate bar, and you agree on a swap. Now imagine that instead of one classroom it is every classroom in the world at once, and instead of snacks people are swapping their country's money.

Someone in India wants dollars to buy something from America. Someone in America wants euros for a holiday. They swap. That swapping, all of it added together, is this market.

If you swap 1 sticker for 3 marbles, what is a sticker worth? Three marbles. You cannot say what it is worth on its own — only against something else.

Money works exactly the same way. "What is a euro worth?" has no answer until you say worth in what. Worth in dollars? Then one euro costs about one dollar and eight cents.

There is one rare sticker left in the shop and ten kids want it. What happens to the price? It goes up, because the kids start outbidding each other.

Now flip it. Ten kids are all trying to get rid of the same sticker and only one person wants one. The price drops, because sellers have to tempt that one buyer.

That is it. That is the entire reason any price anywhere ever moves: which side wants it more right now.

The easy one. You buy a football card for 5 coins because you think it will be popular. Later everyone wants it and you sell it for 8. You made 3.

The strange one. Your friend lends you her card. You sell it straight away for 8 coins because you think it is about to go out of fashion. Later it is worth 5, so you buy one back for 5, hand it to her, and keep 3. You made money while the price fell — and you never owned the card for long at all.

When you measure your height you do not say "I grew nought point zero one metres". You say "I grew one centimetre", because a centimetre is the handy little unit everyone uses.

Prices have a handy little unit too. Instead of saying "it moved 0.0001", traders say "it moved one pip". Same thing, easier mouth.

It rains the same on everybody. If you hold out a spoon you catch a few drops. Hold out a bucket and you catch loads. The rain did not change — your container did.

Pips are the rain. How big a container you hold out is entirely your choice, and it decides whether a bad day costs you pocket money or everything you have.

Imagine borrowing a huge trolley at the shop by leaving a small deposit. You get to push something far bigger than you could afford — but if it tips over even a little, your deposit is gone and the trolley was never yours.

The bigger the trolley compared to your deposit, the less it has to wobble before you lose everything you put in. That is the whole idea, and it is why this lesson exists.

The corner shop sells you a sweet for 10p. If you walk straight back in and ask them to buy it back, they will offer you 9p. Nothing changed about the sweet. That 1p gap is how the shop makes its living.

Every trade works this way. The moment you buy, you could only sell for slightly less — so you begin every single trade a tiny bit behind. It is not a trick, it is the toll.

Think of four schools in four countries. When Sydney's playground empties, Tokyo's fills up. When Tokyo goes home, London comes out. The game never stops — it just moves to a different playground.

And there is one part of the day when two of the biggest playgrounds are out at the same time. That is when it is noisiest, fastest and cheapest to play.

Before a game of marbles you decide: "I am willing to lose five marbles today. If they go, I go home." You decide it while you are calm, before anything has happened.

Nobody has ever decided that well in the middle of losing. That is the moment you start telling yourself it will come back if you just wait a bit longer. Every trader learns this, and most learn it the expensive way.

Imagine marking your height on the door frame every birthday. Join the marks with a line and you can see your whole childhood at a glance — when you shot up, when you barely moved.

A price chart is that door frame. Sideways is time. Up and down is price. Nothing more complicated is happening, no matter how frightening it looks.

Imagine your teacher writes four things about your school day: what mood you arrived in, what mood you left in, your happiest moment and your grumpiest. One little drawing, four facts.

A candle does that for one hour of a price. The fat part shows where it started and where it ended. The thin lines show the highest and lowest it wandered on the way.

Think of a map. Zoomed right in you see your own street and every parked car. Zoomed out you see the whole city and your street is a dot. The city did not change — you did.

A chart works the same way. You choose how much time each candle holds: one hour, four hours, a whole day. Same market underneath, told in bigger or smaller chapters.

Watch someone climbing stairs. Even though they dip down slightly on every step, each step lands higher than the last one. That is a trend going up.

Going downstairs is the opposite: every step lands lower. And a corridor is flat — lots of walking, no height gained. Prices do exactly these three things and nothing else.

Bounce a ball in your room. It stops falling at the floor and stops rising at the ceiling — not because of magic, but because something is there.

Prices do this too. There are heights where buyers keep showing up and heights where sellers keep showing up. You do not need to know why. You only need to notice it happened here before.

Say you are guessing whether the ice cream van will come today. You could look at what it did the last ten days. Or listen to the news that it is going to be hot. Or notice that everyone in your street is already queueing.

Grown-ups arguing about markets are usually just arguing about which of these three to look at.

There are two ways to buy a toy. Buy it now at whatever it costs today. Or leave a note with the shopkeeper: "if it ever drops to five pounds, buy it for me." Then you can walk away and get on with your life.

Trading has exactly those two, plus the barrier from the last section and a place where you will happily take your winnings.

Nobody learns to ride a bike by reading about bikes. But nobody learns from falling off either, unless they notice what they did just before they fell.

So do two things. Practise with pretend money first. And write down every attempt — what you did, why, and what happened. After thirty of those, your notebook starts telling you things no stranger on the internet can.

Picture a bucket you are trying to fill. It has four small holes near the bottom. You can pour as fast as you like — while those holes are open, the bucket never fills.

Almost nobody loses because they guessed the wrong direction. They lose through the holes: trading too big, trading too often, having no plan, and chasing a loss with a bigger bet.

Nobody decides what goes in a cake while the oven is burning. You write the recipe first, then follow it, and if it comes out wrong you change the recipe — not the oven.

A trading plan is that recipe. Four lines is enough to start: what you trade, when you trade it, how much you risk, and what would make you stop for the day.

You would not cross a road with your eyes shut, however much you wanted to get to the other side. Some moments are simply not for crossing.

Four of them come up again and again: a big announcement is minutes away, you are tired or angry, nothing you planned for is on the screen, or you already hit your stop for the day. On those days the best trade is no trade.

A cook who makes one dish four hundred times beats a cook who has tried four hundred dishes once. They know exactly what it looks like when it is going wrong, because they have seen it go wrong before.

Pick one situation on the chart — one you can describe in a single sentence — and take only that. Everything else on the screen is somebody else's trade.

Think of a swimmer. They stretch before, they swim the race, and afterwards they look at the time and talk about what happened. The race is the shortest part.

Trading is the same shape. Before: check what is on today and read your plan. During: take only what the plan describes. After: write down what you did and what happened, while you still remember why.

Imagine a lemonade stand. You do not need to guess whether it is working. You count how many people bought, how much they paid, and what each cup cost you. Three numbers, and the argument is over.

Trading has exactly three too: how often you win, how big your wins are, and how big your losses are. Put together, they say what one average trade is worth to you.

Toss a coin twenty times and you will almost certainly see four or five heads in a row somewhere. Nothing is wrong with the coin. Runs are simply what randomness looks like up close.

Losing trades come in runs too. If you win about half the time, a run of five losses is not a sign that you are broken, or that your plan has stopped working. It is Tuesday.

Nobody takes both stabilisers off on the same afternoon. You take one off, wobble about for a week, and only then think about the other.

Real money is the same. Go across when you have thirty trades written down, a positive expectancy, and a week where you followed your own rules — and go across at the smallest size your broker allows, however silly it feels.