Two traders take the identical trade — same pair, same entry, same stop. One risks $20, the other risks $2,000. The difference is not skill or conviction. It is position size, and it is the single most consequential number a beginner ignores.
What a pip is
A pip is the standard unit of price movement in forex. For almost every pair it is the fourth decimal place:
- EUR/USD moves from 1.0850 to 1.0851 — that is one pip.
- GBP/USD moves from 1.2700 to 1.2710 — that is ten pips.
Yen pairs are the exception. Because the yen is worth so much less per unit, quotes carry two decimals and a pip is the second decimal place. USD/JPY moving from 150.00 to 150.01 is one pip.
Most platforms display one extra digit — a pipette, or tenth of a pip. EUR/USD shown as 1.08505 has a pipette on the end. It is a precision digit, not a pip; misreading it inflates every mental calculation by a factor of ten.
What a pip is worth
A pip is a distance, not an amount. What it is worth in your account depends entirely on how much currency you control — the lot size.
- Standard lot — 100,000 units of the base currency
- Mini lot — 10,000 units
- Micro lot — 1,000 units
For a pair quoted in US dollars, held in a dollar account, the arithmetic is clean:
- Standard lot: roughly $10 per pip
- Mini lot: roughly $1 per pip
- Micro lot: roughly $0.10 per pip
So a 20-pip move is $200 on a standard lot, $20 on a mini, $2 on a micro. Identical chart, identical trade, outcomes two orders of magnitude apart.
When the quote currency is not your account currency, pip value has to be converted at the current rate, so it drifts slightly as prices move. Any decent platform calculates this for you — the point is to know that the number is not fixed.
Sizing a position properly
Most beginners choose a lot size first and discover their risk afterwards. Reverse it. Decide what you are willing to lose, then let that decide the size.
The relationship is:
Position size = (account risk in currency) ÷ (stop distance in pips × pip value per lot)
Worked through: a $5,000 account, risking 1% ($50), with a 25-pip stop on EUR/USD.
- At $1 per pip (one mini lot), a 25-pip loss costs $25 — half the budget.
- Two mini lots gives $2 per pip; 25 pips is $50. That is the size.
The stop is placed where the chart says the idea is wrong. The size is then calculated so that being wrong costs what you decided it would. Those are two separate decisions, and collapsing them — moving a stop closer so you can trade bigger — is how accounts die.
Why this is the lesson that matters
Entry technique gets the attention, but position size is what determines whether a normal run of losses is survivable. Risk 1% per trade and ten consecutive losses leaves you down about 10% — unpleasant, recoverable. Risk 10% per trade and the same ten losses leave roughly 35% of the account, needing a 186% gain to get back.
The market does not become harsher when you size up. Only your margin for error shrinks, and losing streaks are a statistical certainty regardless of method.
What to take from this
- A pip is the 4th decimal on most pairs, the 2nd on yen pairs.
- The extra digit many platforms show is a pipette — one tenth of a pip.
- Pip value scales with lot size: about $10, $1 and $0.10 per pip for standard, mini and micro.
- Choose risk first, place the stop where the chart dictates, then calculate size from both.
- Position size, not entry accuracy, is what keeps you in the game long enough to improve.
Risk sizing is covered in full depth later in the course, where we get into drawdown maths and correlation. For now: never open a position without knowing what it costs to be wrong.