Hong Kong — The size you worked out has a time stamped on it
Two of the three boxes below belong to you and keep indefinitely. The figure the answer leans on does not — it came off a moving screen at an hour, which is why a size worked out at breakfast is a draft by evening.
The arithmetic is short: the money at risk, divided by the distance to the stop-loss multiplied by what one step of price is worth. A common beginner rule keeps one trade under 1% of your money: $100 deposit, $1 at risk, $1 ÷ (20 × $10) = 0.005 lots. Only the last figure comes off a screen — and a screen has an hour on it.
Every line assumes a pair quoted against the dollar, such as EUR/USD, where one pip on a full lot is worth $10 (100,000 units × 0.0001). Other instruments differ; the platform states the exact figures before an order is confirmed. For learning only, not financial advice.
What keeps, and what goes stale
| The input | Whose it is | How long it stands |
|---|---|---|
| The deposit to work from | Yours, and the account's | Until the balance changes |
| The share of it put at risk | Yours, a decision not a fact | Indefinitely — a rule about you |
| The distance to the stop-loss | Half yours: you choose it, the symbol prices it | The number keeps; its worth does not |
| What one step of price is worth | The symbol's, and not on this form | Only while the reading is fresh — the perishable line |
So a size is never simply right. It is right as of a reading, and the reading has an hour on it.
Sized at breakfast, confirmed after dinner
The instrument list keeps its own hours, and a Hong Kong day sits across more than one of them. Hence an ordinary trap here: the sizing is done early, the screen is left, and the confirm lands at a different point in the rotation.
- Morning here is a quiet stretch for parts of the list. A figure read then is real — of that moment, and no other.
- The gap between buying and selling moves through the day. It is on screen both times; nothing is hidden, and nothing is fixed.
- The weekend break confirms nothing. Prices can jump between Friday's close and Monday's open, so a Friday sheet is a draft on Monday.
The repair is one line: write the hour next to the figure, and redo the last step whenever the sheet is older than the sitting.
Redoing the sum when you come back
Read the two live figures
What one step of price is worth at the size you intend, and the current gap between the two prices. Both sit on the order screen before confirming.
Divide again, then date it
Put the fresh step value where the $10 sat. Write symbol, value and hour: memory carries yesterday's figure forward without saying so.
Figures this page cannot produce
This page holds no symbol, no live price and no spread, so nothing on it can be fresh by design. The Exness platform states the exact step value, margin and costs for an order, and a demo account opens that ticket at any hour. Leverage magnifies losses as readily as gains — risk basics sets the amount first.
Questions asked hours after the sum
The sheet was written this morning. Can it be used tonight as it stands?
The two figures that are yours still hold. The step value has to be read again — never yours to keep.
The Standard row says the size is under 0.01. Has the page failed?
No: 0.01 lots is the smallest Standard trade, and a careful percentage on a small deposit lands below it.
Does the answer change simply because the hour changed?
Not by itself. What changes with the hour is the figure it was built from, and that is enough.
Where do the figures this page cannot produce get read off?
Off a demo order ticket: write the step value and the hour beside your sum and confirm nothing — the route is in the first trade. What price does next, nobody predicts.
Where the sizing continues
Which markets keep which hours
Why the list is busy at one hour and still at the next.
Read the timetablesRead a fresh step value before you confirm anything.
A free demo prints the exact step value, margin and cost for an order at whatever hour it opens, with no time limit.
Open a free demo at Exness