Position Size: Check Inputs, Units and Fees

The short answer

Keep a small hypothetical case with known units. Verify account currency, risk mode, entry, stop and costs, then compare one changed field at a time. Trading Studio calculates from those inputs without checking live markets or deciding what risk is suitable.

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Identify what the quantity should represent

Choose the market before interpreting a number. Shares, forex lots, coins and futures contracts are different quantities even when the price fields look similar. Write the expected unit beside the scenario and read the unit next to the output. A small-looking lot number can represent many underlying units, while a futures count refers to whole contracts in the model. The tool cannot infer an instrument specification from a casual name. If you meant a stock and selected a contract mode, correct that choice rather than increasing the account until the result looks familiar. First make the model describe the question you intended.

Separate cash risk from percentage risk

The risk control accepts a cash amount or a percentage of the entered account. Verify the active form before typing. In an illustrative account of $10,000, a chosen cash budget of $50 is not the same as entering 50 in percent mode. Those numbers are examples for reading the form, not a recommended account size or risk level. Keep the budget definition with your notes. Changing the account affects a percentage budget differently from a fixed cash budget. If an output changes unexpectedly after an account edit, check that relationship before assuming the calculator has changed its method or lost your earlier values.

Read entry, stop and direction together

Enter two different positive prices for “Entry price” and “Stop-loss”. The model reads their relative positions to identify direction, and their distance determines part of the loss calculation. As a purely hypothetical share example, entry $100 and stop $98 leave a $2 distance. It does not mean that either price is a sensible market decision or that the stop will execute there. Read the displayed direction after editing either field. A misplaced decimal or reversed pair can still create an accepted calculation, but it answers another scenario. The app does not read a chart or compare the inputs with a live quote.

Add costs before comparing rounded quantities

For that simple same-currency share example, a $50 budget divided by a $2 distance gives 25 shares before fees. If a hypothetical $2 commission per order is entered, the model allows for two such commissions; the available budget for the price move becomes $46, giving 23 whole shares. This is arithmetic under stated example assumptions, without an execution test or a broker quote. Other modes use their own fee fields. A commission per lot or round trip must not be interpreted as the stock mode’s per-order amount. Keep the units of each cost with the figure when comparing results.

Check the currency conversion direction

Account currency and price currency can differ. Read the rate label describing how one currency converts to the other, rather than entering a familiar exchange number from memory. An inverted rate can distort both risk and quantity while looking numerically plausible. “Get ECB rate” retrieves a public reference through the website’s server; it is not a live dealing quote. The ECB source, checked on 22 October 2026, states that reference rates are informational and discourages transaction use. Preserve the rate’s date and direction with the scenario. A conversion used for explanation need not match the broker’s executed conversion or additional charges.

Match the product specification field by field

For forex, examine “Contract size per lot” and “Pip or point size”. For futures, examine “Tick size”, “Tick value” and the contract currency. Use the specification of the exact product and account rather than another instrument with a similar label. A preset is an input aid, without a guarantee that every provider uses that specification. Do not fix an unexpected answer by changing only one contract number until the output fits. Record the source for each changed value. The comparison becomes explainable when you can say which unit, point movement and monetary value each field is meant to represent.

Interpret a zero and warnings without chasing a result

The model rounds down to a quantity step. A small budget can therefore fail to cover the minimum modelled unit, producing zero. Read that condition rather than treating zero as an invitation to raise risk. Margin, exposure and stop-based loss are separate outputs. In crypto mode, liquidation is a simplified isolated linear estimate, without every exchange’s tiers or collateral arrangements. A warning disappearing does not certify a safe trade. The official ESMA/EBA warning linked here explains execution and leveraged-product risks, including limits of stops. This guide checks the entered model; it cannot establish a personal maximum loss or assess suitability.

Keep a reproducible input record

Before copying a quantity, keep market, currency, risk mode, prices, costs and specification source together. Date the scenario and identify the one input changed in an alternative. A number copied without its unit is difficult to audit later. If the platform differs, compare assumptions before claiming either calculation is wrong. Trading Studio submits no broker order and does not monitor positions. The record you create explains your arithmetic; it is not proof of an executed trade or a recommendation. Use the tool to inspect a defined hypothetical calculation, and ask the provider about product-specific or account-specific rules that the model does not represent.

Questions you might still have

Why did the result change with my balance?

Check cash versus percentage risk. A percentage budget changes with the balance, while a fixed cash entry describes a different condition.

Can I put the same commission in every mode?

Read the field’s unit first. Per-order, per-lot and per-contract costs do not describe the same quantity.

Does zero mean the app is broken?

It may mean the chosen budget does not cover one modelled size step. Read the warning and inspect the specification.

Is the entered stop a guaranteed loss limit?

No. Actual execution can differ. The linked official warning explains why a planned stop is not a universal guarantee.

Can an ECB reference replace a broker quote?

It is an informational reference, without a promise of executable conversion. Check the relevant rate and direction.

What should I copy with the size?

Keep its unit, assumptions and date so the result can be understood outside the calculator.

Sources & useful details

These guides are written from the current LoschaZ tools and the sources listed above. Examples are illustrations, not tests on every device or promises of an identical result.