Nasdaq Execution Console

Account Balance ($) Account Currency USD Conversion Rate 1 account currency unit equals this many USD. Desired Risk Percentage (%) Stop Loss Distance Allocation (Points)

Advanced Broker Specification Override Drawer ▼

Broker Contract Specification Size

Minimum Tradeable Lot Broker Lot Step

Confirm the NAS100 contract size inside MT4/MT5 before using the output during high-volatility index sessions.

The Formula

To calculate your position size in lots, use the following formula:

Position Size = (Account Balance × Risk Percentage) ÷ (Stop Loss in points × Value per Point)

Key NAS100 Specs

Before calculating, check your broker's specific specifications because these can vary by platform and symbol.

• Contract Size: Default model uses 10 units per standard lot. Verify your broker because some NAS100 symbols use mini or synthetic index contracts.
• 1 Pip/Point Value: With contract size 10, a 1 point move equals about $1.00 on 0.10 lots, or about $10.00 on 1.00 standard lot.

Step-by-Step Example

Say you have a $10,000 account, want to risk 1% of it, and your stop loss is 50 points away.

1. Determine your maximum risk: $10,000 × 0.01 = $100.
2. Calculate the cost per point: $100 ÷ 50 points = $2 allowed per point.
3. Determine lot size: Since $1.00 per point is equivalent to 0.10 lots, the required position size is 0.20 lots, which controls about 2 NAS100 contract units.

NAS100 Contract & Calculation Reference Guide

NAS100 position sizing is often misunderstood because index CFDs do not behave like standard forex pairs. A forex trader may be used to thinking in pips, but NAS100 risk is normally measured in index points. If the index quote moves from 18,500.00 to 18,525.00, the stop loss distance is 25 points. The key question is what one lot means on the broker account. In the default Big42 Trading NAS100 model, the broker contract size is set to 10, which means 1.00 lot represents about 10 dollars per index point, while 0.10 lots represents about 1 dollar per point.

This is why generic NAS100 lot size calculators can be dangerous. If a calculator assumes 1 lot equals 1 dollar per point, but the broker treats 1 lot as 10 dollars per point, the real cash risk can be ten times larger than expected. The Big42 Trading calculator avoids that single-assumption problem by exposing the broker contract size directly in the calibration drawer. The default model is aligned with the common 10-unit NAS100 contract example, but the field should still be matched against the broker specification panel before relying on the result.

The formula is intentionally transparent. First, account balance is multiplied by the selected risk percentage to create a cash risk amount. If the account currency is not USD, the manual conversion rate translates that risk into the USD sizing basis. Next, the stop loss points are multiplied by the point multiplier, which is 1.0 for NAS100. Finally, the converted cash risk is divided by the stop loss distance and broker contract size. The output is then rounded down to the configured lot step so the suggested order size does not exceed the risk budget.

The most important practical step is broker verification. In MT4 or MT5, open Market Watch, right-click the NAS100 symbol, choose Specification, and review the contract size and minimum volume step. If your broker uses a different symbol name, such as US100, NAS100.cash, USTEC, or NASDAQ, the contract model may differ. Update the calibration drawer before using the lot result for an evaluation account or funded account where a small sizing mistake can create a rule violation.