Direct answer: what “pipette definition” means in forex
In forex, a pipette definition is the stated rule for what one “pipette” equals in terms of price movement for a specific currency pair and quote format. A pipette is typically a fraction of a pip, so the pipette definition lets you translate between a price move measured in pips and a smaller move measured in pipettes.
Because forex quotes differ (for example, some pairs are commonly quoted with four or five decimal places, and the pip size can differ by convention), “pipette” has no single universal value that is valid for every situation. A correct pipette definition is the one that matches the pair’s pip size convention and the way the platform formats prices.
Mechanics: the step-by-step model
A simple model is to separate four ideas: (1) pip size, (2) pipette fraction, (3) price change, and (4) interpretation.
1) Define the pip size first
A “pip” is the basic unit of price movement used in forex. Its numeric size depends on the quoted decimal convention of the pair. For interpretation, you need the pip size in price terms (for example, “pip size equals 0.0001” for a pair where one pip corresponds to one ten-thousandth of a unit).
2) Define what one pipette equals
A pipette is a smaller step than a pip. In many market quoting conventions, one pipette equals one tenth of a pip (so it would be “0.1 pip” in movement units). However, the only dependable pipette definition is the one that is consistent with the quote format you are using and the stated pip size.
So, at the mechanics level:
- Let pip_size be the numeric price change for 1 pip.
- Let pipette_fraction be the numeric fraction of a pip (for example 0.1 pip per pipette, if that convention is used).
- Then pipette_size = pip_size × pipette_fraction.
3) Measure a price change in quote terms
If the price changes by Δprice (difference between the new quote and the old quote), you can express that movement in pips or pipettes.
- pips_moved = Δprice ÷ pip_size
- pipettes_moved = Δprice ÷ pipette_size
These equations are “definition-based”: once pip_size and pipette_fraction are fixed, the conversion from price change to pip/pipette change is deterministic.
4) Produce outputs that match the unit you want
After conversion, you typically get one of these outputs:
- A movement size in pipettes (useful when the quote format or platform emphasizes finer granularity).
- A movement size in pips (useful when risk or commentary uses pip units).
Either output can be used for reporting, as long as you keep the definitions consistent.
Evidence or example you can verify (with explicit assumptions)
Because the key uncertainty is the numeric definition, this section uses assumptions rather than live numbers.
Example A: converting pipettes to price change
Assumptions:
- pip_size = 0.0001 per pip.
- pipette_fraction = 0.1 pip per pipette.
- Therefore pipette_size = 0.0001 × 0.1 = 0.00001.
If a platform reports a move of 50 pipettes, then:
- Δprice = pipettes_moved × pipette_size
- Δprice = 50 × 0.00001 = 0.0005.
To cross-check using pips:
- pips_moved = Δprice ÷ pip_size = 0.0005 ÷ 0.0001 = 5 pips.
- 5 pips equals 50 pipettes under the 0.1 pipette fraction assumption.
Example B: converting a quote change into pipettes
Assumptions (same):
- pip_size = 0.0001
- pipette_fraction = 0.1
- pipette_size = 0.00001
If Δprice = 0.00023, then:
- pipettes_moved = 0.00023 ÷ 0.00001 = 23 pipettes.
- pips_moved = 0.00023 ÷ 0.0001 = 2.3 pips.
Material limitation: real platform displays may round the reported pipettes or show a different number of decimal digits. If rounding occurs, you may see slight mismatches when you recompute conversions from displayed prices.
What about converting pipettes to money?
A common pitfall is assuming that “pipettes moved” directly equals profit or loss in currency terms. The conversion from price movement units to monetary value depends on contract size, the account and base/quote currency relationship, and the platform’s contract specifications. Without those, pipettes alone do not determine money outcomes.
Limitations and risks (including failure modes)
1) Definition mismatch across platforms or quote formats
If one system defines pipettes relative to a pip size that differs from another system, then the same numeric pipette count can correspond to different price movements. This is the main failure mode for “pipette definition” misunderstandings.
How to reduce the risk (independently): confirm the pair’s pip size convention and the pipette fraction implied by the platform’s quoting format, then apply the same conversion equations consistently.
2) Rounding and display precision
If displayed prices are rounded to fewer decimals than the platform uses internally, then converting between pipettes and price changes based on displayed values can lead to small errors. This can show up especially when the move is small.
3) Costs and execution effects change realized outcomes
Even though pipette-to-price conversions are deterministic under fixed definitions, realized trading results vary with spread, execution timing, commissions, and other costs. A quote can move by a certain number of pipettes, while the net outcome after costs differs.
4) Historical relationships don’t remove uncertainty
Using past examples to infer what future pipette movement will “mean” is uncertain. A pipette definition is a measurement rule, not a predictive pattern.
Verification or next question: how to check your understanding
To verify that you understand pipette definition, you can do three checks using only the definitions you choose:
- Convert a known quote change into pipettes using your assumed pip_size and pipette_fraction.
- Convert back to price change and confirm it matches (within rounding).
- Ensure your conversion is consistent with how your platform reports pipettes for the same pair.
If you want to go one step deeper, the next question is: what exact pip size and pipette fraction are implied by the specific pair’s quote format and your platform’s contract specifications? Those details determine whether your pipette definition matches the reporting you are reading.