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Lot Size Calculator

See the largest position you can open on a single instrument under For Traders’ live leverage and per-symbol margin limits — for your exact challenge type.

$

Your starting balance in USD.

Phase 1 & 2 — Classic, One Step, Two Step, Fast

$

Use the live price shown in your trading terminal.

Maximum position size

3.91 lots

Position value $1,600,000 · margin $40,000

Limited by the 40% per-symbol rule

Leverage

1:40

Margin per 1.00 lot

$10,237.30

Margin limit (40%)

$40,000

Contract size

100

Position limit: you may commit at most 40% of your account size as margin on any one symbol. The figure below already applies that limit.

The 40% margin rule applied only to accounts purchased before 8 June 2026. Accounts opened since then have no margin rule.

Lot size check

LotsPosition valueMargin% of accountAllowed?
0.01$4,095$102.370.1%Allowed
0.10$40,949$1,023.731.0%Allowed
0.25$102,373$2,559.332.6%Allowed
0.50$204,746$5,118.655.1%Allowed
1.00$409,492$10,237.3010.2%Allowed
2.00$818,984$20,474.6020.5%Allowed
5.00$2,047,460$51,186.5051.2%Over limit
10.00$4,094,920$102,373.00102.4%Over limit

How the limit works

Two rules apply, and the stricter one wins:

1. The 40% per-symbol rule — margin committed to any single symbol may not exceed 40% of your account size. On your $100,000 account that is $40,000 of margin per symbol.

2. Leverage sets how much margin each lot needs: Margin per lot = (Contract size × Price) ÷ Leverage

Your maximum is therefore 40% of account size ÷ Margin per lot, and the 40% rule is normally what limits you.

Leverage is set per symbol and per challenge type — forex gets the highest leverage, while indices, metals and Crypto get lower leverage because they move further.

Leverage and maximum size by symbol

SymbolClassLeverageMargin / lotMax lots
BTCUSDCrypto1:3$21,7981.84
ETHUSDCrypto1:3$6,4056.25
BRENTEnergies1:40——
CLEnergies1:40——
NGASEnergies1:40$72954.85
WTIEnergies1:40$2,11718.89
AUDCADForex1:125$56071.38
AUDCHFForex1:125$56071.38
AUDJPYForex1:125$56071.38
AUDNZDForex1:125$56071.38
AUDSGDForex1:125$56071.38
AUDUSDForex1:125$56071.38
CADCHFForex1:125$56970.34
CADJPYForex1:125$56970.34
CHFJPYForex1:125$98140.76
EURAUDForex1:125$91443.77
EURCADForex1:125$91443.77
EURCHFForex1:125$91443.77
EURCZKForex1:125$91443.77
EURGBPForex1:125$91443.77
EURHUFForex1:125$91443.77
EURJPYForex1:125$91443.77
EURNOKForex1:125$91443.77
EURNZDForex1:125$91443.77
EURPLNForex1:125$91443.77
EURSEKForex1:125$91443.77
EURSGDForex1:125$91443.77
EURTRYForex1:125$91443.77
EURUSDForex1:125$91443.77
GBPAUDForex1:125$1,07037.39
GBPCADForex1:125$1,07037.39
GBPCHFForex1:125$1,07037.39
GBPJPYForex1:125$1,07037.39
GBPNZDForex1:125$1,07037.39
GBPSGDForex1:125$1,07037.39
GBPUSDForex1:125$1,07037.39
NOKSEKForex1:125$83479.50
NZDCADForex1:125$46486.20
NZDCHFForex1:125$46486.20
NZDJPYForex1:125$46486.20
NZDUSDForex1:125$46486.20
SGDJPYForex1:125——
USDCADForex1:125$80050.00
USDCHFForex1:125$80050.00
USDCNHForex1:125$80050.00
USDCZKForex1:125$80050.00
USDHKDForex1:125$80050.00
USDHUFForex1:125$80050.00
USDJPYForex1:125$80050.00
USDMXNForex1:125$80050.00
USDNOKForex1:125$80050.00
USDPLNForex1:125$80050.00
USDSEKForex1:125$80050.00
USDSGDForex1:125$80050.00
USDZARForex1:125$80050.00
ASXIndices1:20——
AUS200Indices1:20——
CACIndices1:20——
DAXIndices1:20——
DOWIndices1:20——
EU50Indices1:20$359111.39
FRA40Indices1:20——
FTSEIndices1:20——
GER30Indices1:20$1,42928.00
HK50Indices1:20——
HKINDIndices1:20$161248.86
JAP225Indices1:20$201,979.16
NIKKEIIndices1:20——
NSDQIndices1:20——
SPIndices1:20——
STOXX50Indices1:20——
UK100Indices1:20$71555.95
US100Indices1:20$1,44327.72
US30Indices1:20$2,60115.38
US500Indices1:20$374107.07
XAGUSDMetals1:40$7,3695.43
XAUUSDMetals1:40$10,2373.91
XPTUSDMetals1:40——

Max lots assume the account size entered above and a recent price snapshot — always confirm with the live price.

The 40% limit applies per symbol — it is measured against your account size ($100,000), so your cap is $40,000 of margin on XAUUSD. Leverage shown is the current rule for the selected challenge type. This calculator covers position size only — your daily and maximum drawdown limits still apply and will usually be reached long before this maximum.

Lot size FAQ

Margin per lot is the contract size times the price, divided by the symbol’s leverage. The maximum position is the margin you may commit on that symbol divided by the margin per lot.

Only to accounts purchased before 8 June 2026. Accounts opened since then have no per-symbol margin rule, so leverage alone sets how much margin a position needs.

Evaluation accounts get more leverage than Master and static-drawdown accounts. The calculator uses the leverage of the challenge type you pick.

When the For Traders price feed carries the symbol, the price field fills with its live mid-price and refreshes every 30 seconds. You can always overwrite it with the price in your terminal.

No. The For Traders calculators are free and work without signing up.

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