Why the Same Lot Size Is Not the Same Trade on Two Instruments (Pakistan)
Pick a symbol and the ticket asks for a volume — but the volume only means something once the symbol is fixed. Contract size, price precision, the volume step, the quoting session and the rollover moment are written into each instrument specification, and they are not shared between a currency pair, a metal and an index. This page reads those lines in plain language, so a size that suited one symbol is not carried over blindly to the next.
Open Exness Account →A trading ticket asks for two things, a symbol and a volume, but the volume only acquires meaning once the symbol is fixed. Contract size, price precision, the volume step, the quoting session and the rollover moment are written into each instrument specification separately, so a currency pair, a metal and an index share none of them. That is the whole reason two orders with identical numbers on the ticket behave differently once they are open.
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What the specification decides before the order is placed
- Contract size is the first line of any instrument specification: it fixes what one lot holds, and for a standard currency pair that is 100,000 units of the base currency.
- Price precision is set per symbol — most currency pairs quote to four decimals, yen pairs to two — so an identical count of points is a different distance on each.
- Minimum volume and volume step decide which order sizes exist at all; 0.01 lots is a rung on a ladder, not a fixed amount of exposure.
- Quoting hours belong to the instrument, not to the clock on the wall: currency pairs, metals and index instruments each stop and restart on their own schedule.
- The trading day ends at a rollover moment fixed in server time, and one weekday in the week carries the weekend rollover with it.
- The cost of a lot is presented differently by account type — inside the spread on some, as a separate charge per lot on others — while the contract itself is unchanged.
- Every line above is readable before the order: the specification window sits beside each symbol in MetaTrader 4 and MetaTrader 5.
The account type changes the cost line, never the contract
| Account | Platform | Spread from | Commission | Best for |
|---|---|---|---|---|
| Standard | MT4 / MT5 | 0.3 pips | None | Most traders — with no minimum initial deposit |
| Standard Cent | MT4 / MT5 | 0.3 pips | None | Beginners — trade in cents |
| Pro | MT4 / MT5 | 0.1 pips | None | Instant execution — from $200 |
| Raw Spread | MT4 / MT5 | 0.0 pips | From $3.50 per side / lot | Tight spreads — from $200 |
| Zero | MT4 / MT5 | 0.0 pips | From $0.05 / lot | Scalping — zero spread on top pairs |
Delays and slippage may occur. No guarantee of execution speed or precision.
Where each specification line becomes visible
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The account currency and type the cost line is quoted in.
Account Types
Where the cost of a lot moves between spread and a separate charge.
Web Terminal
The browser ticket asks for lots; the symbol supplies the meaning.
MetaTrader 4
Right-click a symbol in Market Watch to open its specification.
MetaTrader 5
Depth of market shows the step alongside the price.
Demo Account
Read an unfamiliar specification before real size is put behind it.
The readings behind these lines live on their own pages: quoting sessions and the rollover clock, overnight treatment per symbol, volume in lots turned into exposure and what a round turn adds up to. For the step itself, see the quoted distance between bid and ask, and for how tightly it holds, spread stability.
The short version
Two tickets can carry the same volume and still describe two different trades. Contract size sets what one lot holds; price precision sets how far one point moves it; the volume step sets which sizes exist at all; the quoting session sets when the instrument is priced; and the rollover moment sets whether the position counts as held overnight. None of these five lines is shared across symbols, and none of them appears on the ticket itself — they live in the instrument specification, one right-click away in MetaTrader 4 and MetaTrader 5.
The practical habit is short: open the specification of an unfamiliar symbol, read those five lines, and only then decide the size. Forex and CFDs carry a high risk of loss, and a size that felt comfortable on one instrument can be far from comfortable on another.
Open Exness Account →One lot is a container, and every symbol packs it differently
Contract size is the line that turns a volume into an amount. On a standard currency pair one lot holds 100,000 units of the base currency, so one step of price moves the position by a fixed sum. On a metal the same line counts ounces; on an index instrument it counts index points. The word on the ticket does not change — the container behind it does.
This is why sizing by lots alone breaks down the moment a trader leaves familiar symbols. The steadier habit is to think in what one point is worth, which is exactly what contract size and price precision produce together; the lot size calculator does that arithmetic per symbol.
Price precision decides how far a point actually is
Most currency pairs are quoted to four decimals and yen pairs to two, and other instruments carry their own precision. A move of ten points therefore has no meaning until the symbol is named: on one instrument it is a rounding artefact, on another it covers a good part of the session range.
The same line explains why a spread reads differently across symbols even when the figure looks similar. The quoted distance between bid and ask is expressed in the precision of that instrument, not in a shared unit — the per-symbol readings sit on the live spreads page.
The volume step decides which orders exist
Minimum volume and volume step are as much part of the specification as the price lines. A step of 0.01 lots means the ladder of possible sizes is discrete, and the rung below the one you had in mind may simply not exist on that symbol. An exposure that lands neatly on one instrument can be unreachable on another without changing the plan.
Rounding to the nearest rung is not a neutral act either: where the contract is large, one rung is a meaningful change in exposure, while on a smaller contract the same rung is barely visible in the account.
Hours and rollover are specification lines too
An instrument is priced when its own market is open, and that calendar belongs to the instrument. Currency pairs run through the weekday sessions; instruments tied to an exchange follow the calendar of that exchange, holidays included. Orders resting outside the session simply wait, and the first price after a break is not obliged to match the last price before it. Session boundaries per symbol are on the trading hours page.
The trading day also has an end, fixed in server time, and a position still open at that moment is treated as held overnight. One weekday carries the weekend rollover, so the same position held across that boundary is not treated like the others. The per-symbol treatment is listed on the swap rates page.
How to read a symbol before sizing the order
- Open the specification of the symbol in front of you, not the one traded yesterday — in MetaTrader 4 and MetaTrader 5 it sits behind a right-click on the symbol in Market Watch.
- Read contract size first, and convert it into what one point of price is worth on one lot.
- Check price precision, then restate the stop distance and the target in that precision instead of in points borrowed from another chart.
- Read minimum volume and volume step, and choose a size that exists on the ladder rather than the one rounded in your head.
- Check the quoting session, and the exchange calendar behind it where there is one, so a position is not opened into the last minutes before a break.
- Check the rollover moment last, and decide deliberately whether the position is meant to be held past it.
Specification lines are set per instrument and can be revised by the broker — read them in the terminal each time an unfamiliar symbol enters the plan.
What the specification sets, and where it shows up
| Line in the specification | What it fixes | Where it becomes visible |
|---|---|---|
| Contract size | How many units, ounces or index points one lot holds | What one step of price is worth on the open position |
| Digits and price precision | How many decimals the quote carries | How far ten points really is, and how the spread reads |
| Minimum volume | The smallest order the symbol accepts | Whether a small intended exposure is expressible at all |
| Volume step | The increment between one order size and the next | The rounding that happens between the plan and the ticket |
| Quoting session | The hours and weekdays the instrument is priced | Orders that wait outside the session, and the gap on reopening |
| Rollover time | The moment the trading day ends for that symbol | Whether a position counts as held overnight |
| Swap treatment | How an overnight position is charged or credited | The weekday that carries the weekend rollover |
Specification lines are per instrument and can change — open the specification of the symbol in the terminal before sizing an order.
Frequently asked questions
Why does the same lot size behave differently on two instruments?
What does contract size actually mean on a trading ticket?
Is a pip the same as a point on every symbol?
Why do some quotes carry more decimals than others?
What is the volume step, and why can I not order any size I like?
Do all instruments trade during the same hours?
When does the trading day end for an instrument?
Why is the overnight amount on one weekday larger than on the others?
Where do I find the specification for a symbol?
Does the account type change an instrument specification?
Further reading
Background from independent sources: the foreign exchange (forex) market, contracts for difference (CFDs).