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Position size
Forex, USD accountHow many lots for a 1% risk with a 25-pip stop?
$
%
pips
$
Position size
2.00 standard lots
- Amount at risk
- $500.00
- Units
- 200,000
- Value per pip
- $20.00
Lots at each risk level same account and stop
Formula lots = (balance × risk%) ÷ (stop pips × pip value) = (50,000 × 1%) ÷ (25 × 10) = 2.00
Pip value
USD accountWhat is one pip worth on 1 lot of EUR/USD?
lots
pips
Value per pip
$10.00 per pip
- Units
- 100,000
- Pip size
- 0.0001
- The move is worth
- $250.00
Formula pip value = units × pip size = 100,000 × 0.0001 = $10.00
Margin
EUR/USD, USD accountHow much margin does 1 lot need at 1:30?
lots
$
Required margin
$3,616.67
- Notional
- $108,500
- Share of balance
- 36.2%
- Free margin
- $6,383.33
Balance used as margin
Formula margin = units × price ÷ leverage = 100,000 × 1.0850 ÷ 30 = $3,616.67
Risk / reward
any marketIs a 25-pip stop and a 50-pip target worth it?
Reward to risk
1 : 2.00
- Risk
- 25 pips
- Reward
- 50 pips
- Break-even win rate
- 33.3%
The trade on the price line
StopEntryTarget
Formula ratio = |target − entry| ÷ |entry − stop|, break-even win rate = 1 ÷ (1 + ratio)
Drawdown recovery
any accountAfter a 20% loss, what gain gets the account back?
%
%
Gain needed to recover
25.0%
- $10,000 becomes
- $8,000
- Months at that return
- 11.3
Loss against the gain that repairs it
Loss20%
Gain25%
Formula gain = 1 ÷ (1 − loss) − 1 = 1 ÷ 0.80 − 1 = 25.0%
Compounding
same return every month, an assumptionWhat does $10,000 at 2% a month become in 3 years?
$
%
months
Ending balance
$20,399
- Growth
- +104.0%
- Doubles after
- 35 months
Balance month by month
Formula end = start × (1 + r)months = 10,000 × 1.0236
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- Median ending balance
- -
- Runs that end below the start
- -
- Median worst drawdown
- -
Simulated (S): 20 random runs of 200 trades from a $10,000 start, risk compounded on the balance. Not a forecast. Full simulator with 1,000 runs
- Longest losing streak, most likely
- -
- Chance of 5 or more in a row
- -
- Chance of 8 or more in a row
- -
Exact probabilities (formula, no sampling): chance of at least one run of N losses in a row, for independent trades with a fixed win rate. Risk of ruin calculator
-pass
- Hit the loss limit first
- -
- Still open after 300 trades
- -
- Median trades to pass
- -
Simulated (S): 2,000 random challenges, risk on the starting balance, static loss limit, no daily limit. Real rules differ by firm. Full prop-firm simulator
Guides
“The floor equals that high minus the drawdown, rises with every new high and never falls back.”
From the guide: How prop firm drawdown rules work
Trailing drawdown
$100,000 account, 5% trailing limit
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PriceProjected range
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CalmNormalBuildingStorm
Phase Corridor, illustrative chartHow it works
PriceCentre lineCorridor
Support & Resistance Zones, illustrative chartHow it works
PriceResistance zoneSupport zone
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The pip value is found in the quote currency, then converted to your account currency at the current rate. The formula is shown under each result.
On TradingView, where the source code is published with each script.
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- How to calculate position size
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- How to keep a trading log
- How prop firm drawdown rules work
- How much to risk per trade in a prop firm challenge
- The math behind a prop firm challenge pass rate
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- What is leverage, and how does margin work?
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