Three words trip up almost every beginner: lot, leverage and margin. They sound technical, but each answers a plain question. How big is my trade? How much can I control with my deposit? And how much of my money does the broker set aside to let me do it? Get these straight and position sizing stops being a mystery.
01 A lot is the size of your trade
Currencies move in tiny increments, so trading one unit at a time would be pointless. Instead trades are measured in lots. A standard lot is 100,000 units of the base currency. Because that is large, brokers also offer smaller sizes so beginners can trade sensibly.
The takeaway is simple. A bigger lot means every pip is worth more, in both directions. Most new traders should start with micro or mini lots so a losing trade costs a few US dollars while you learn, not a few hundred.
02 Leverage lets you control more than you deposit
Leverage is a loan of buying power from your broker. With leverage of 1:100, every 1 US dollar of your own money controls 100 US dollars in the market, so a 1,000 US dollar deposit can hold a 100,000 US dollar position. That sounds like a gift, and in the marketing it is always framed as one. The catch is that leverage multiplies your losses exactly as much as your gains.
03 Margin is the deposit held against your trade
Margin is the slice of your account the broker freezes as a good-faith deposit while a leveraged trade is open. At 1:100 leverage, a 10,000 US dollar position needs 100 US dollars of margin. It is not a fee, it is set aside and returned when you close. If losses eat into your account and your remaining balance can no longer cover the margin, the broker issues a margin call and may close your trades automatically. That is the mechanism that wipes out over-leveraged beginners.
You deposit 1,000 US dollars and open a full standard lot on EUR/USD, where one pip is worth about 10 US dollars. The market moves 30 pips against you, a perfectly normal daily swing. That is a 300 US dollar loss, nearly a third of your account, on one ordinary move. Trade a micro lot instead and the same 30 pips costs about 3 US dollars. Same market, very different survival odds. Size is a choice, and it is yours.
Treating high leverage as free firepower. Just because a broker offers 1:500 does not mean you should use it. Professionals often trade at a small fraction of the leverage available to them. The number to control is not the leverage on offer, it is how much of your account you risk per trade, which we cover in the risk lesson.
- How many units is a mini lot?
- At 1:100 leverage, how large a position does a 500 US dollar deposit control?
- Does leverage change your potential loss, your potential gain, or both?
Show answers
1) 10,000 units. 2) 50,000 US dollars. 3) Both, by the same amount.
- A lot is trade size. Standard is 100,000 units, mini is 10,000, micro is 1,000. Start small.
- Leverage lets a small deposit control a large position, and it multiplies losses just as much as gains.
- Margin is the deposit held against a leveraged trade. Run out of it and the broker closes you out.
It is borrowed buying power from your broker. Leverage of 1:100 means each 1 US dollar of yours controls 100 US dollars in the market, magnifying both profit and loss.
The leverage itself is neutral, but using a lot of it encourages oversized positions, and that is dangerous. The risk is not the ratio on offer, it is trading too big for your account. Keep your risk per trade small and high leverage becomes almost irrelevant.
They are two sides of the same coin. Leverage is the ratio that multiplies your buying power. Margin is the actual deposit the broker holds to open the leveraged position. Higher leverage means less margin required for the same trade.
Further reading: ESMA leverage limits for retail CFD traders, the European regulator rules that cap major currency pairs at 30:1.
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