Pips, lots, leverage and margin: the numbers that save your account

If there's one lesson not to skip, it's this one. Pips, lots, leverage and margin are the four numbers that decide how much you win or lose on every trade. People who don't understand them well open positions that are too big, get a margin call and tell you "forex is a scam". The truth is they hadn't understood the units of measurement. Let's learn them properly, with real calculations.

The pip: the unit of movement

The pip (percentage in point) is the smallest "standard" price change of a pair. In most cases it's the fourth decimal place:

• EUR/USD goes from 1.1000 to 1.1001 → it moved 1 pip.
• From 1.1000 to 1.1025 → 25 pips.

For yen pairs the pip is the second decimal place: USD/JPY from 150.00 to 150.01 is 1 pip.

Many brokers show one more decimal, the pipette (a tenth of a pip). So 1.10005 means half a pip above 1.1000. Don't get confused: always count from the fourth decimal (the second for yen).

The lot: how big your position is

The lot is the unit of size of a position:

The bigger the lot, the more the pips are worth. For a pair where the dollar is the quote currency (like EUR/USD) and a dollar account, this rule of thumb holds:

To calculate pip value for any pair and your account currency use the pip value calculator: it also accounts for the exchange rate.

Leverage: a double-edged multiplier

Leverage lets you control a position larger than the capital you have. With 1:30 leverage and a 1,000 deposit, you can open positions up to 30,000 in nominal value.

It sounds like a gift, and it attracts everyone. But leverage doesn't create money: it amplifies results, positive and negative. With high leverage a small move against you produces a large loss relative to your capital.

In the European Union and UK, for retail clients, regulators limit leverage: 1:30 on major pairs, 1:20 on minors and gold, 1:10 on commodities and 1:2 on cryptocurrencies. Offshore brokers may offer 1:500 or more: that's a warning sign, not an advantage.

Margin: the deposit set aside

Margin is the amount the broker "freezes" in your account to keep a position open. It's not a cost: it becomes available again when you close. It's calculated like this:

Margin = (lots × 100,000 × price) ÷ leverage

You can check the numbers with the margin calculator.

Margin call and stop out

Each broker sets two thresholds based on the margin level (equity ÷ used margin × 100):

• Margin call: a warning (usually at 100%): your free margin is gone, you can't open new positions.
• Stop out: the forced closing of positions, usually when the level drops to 50% (for European retail clients the regulator requires closing at 50% of margin).

That's why you should never use all the available margin: a small swing would throw you out of the market, often at the worst point.

How much to risk really: a preview

You've seen how pips, lots and leverage connect. In the risk management lesson we'll learn to choose position size starting from how much you're willing to lose and not from how much leverage lets you open. Here's the formula, which you'll use on every single trade:

Lots = (balance × risk %) ÷ (stop loss in pips × pip value per lot)

With 5,000, 1% risk (50), a 25-pip stop and a pip worth 10 per lot: 50 ÷ (25 × 10) = 0.20 lots. Try it now with the lot size calculator.

In short

• The pip is the fourth decimal (the second for yen): it measures the move.
• The lot measures size: 1 lot = 100,000 units. A pip's value depends on the lot.
• Leverage amplifies results and losses: the limit is set by the broker, real risk by your size.
• Margin is the deposit set aside; too much exposure brings margin calls and stop outs.
• Size is calculated from the stop, not from leverage.

Practical exercise

1. Calculate the value of 1 pip for 0.30 lots of EUR/USD and 0.30 lots of USD/JPY (use the calculator).
2. Calculate the margin required for 1 lot of EUR/USD with 1:30 and with 1:10 leverage. What changes? And the risk?
3. With a 2,000 account you decide to risk 1%: how many lots do you open with a 20-pip stop?