Free trader tools — built by traders, no fluff
Strategy testing, pip values, position sizing, drawdown math. Honest calculators that survive your worst trade.
Dollar value of 1 pip — before you size the trade.
1 pip
$10
per pip in your currency
10 pips
$100
typical scalp range
50 pips
$500
typical swing range
Exact lot size for any pair, account, risk %, and stop loss. Survives bad trades by capping damage.
Max loss
$10
per trade
Lot size
0.05
1 pip ≈ $1.00
Risk level
—
—
Van Tharp's 1% rule: 30 losses in a row at 1% = -26% account. At 5% = -78%. Survival compounds.
Cut broker cost with cashback →
Lost X%? See how much gain you need to break even — math punishes deep losses harder than you think.
After DD
Lost
Starting: $1,000
Remaining
$800
after drawdown
Required gain
25%
on remaining balance
To break even
$200
profit needed
Recovery ladder — per Larry Williams
| Loss | Required gain | At ~20%/yr trader |
|---|
For reference: S&P 500 averages ~10%/year. Top retail forex traders manage ~20-30%/year. A 50% drawdown needing +100% to recover takes most traders 3-5 years.
See your strategy's edge, drawdown, and ruin risk — before risking real money. Works for bot, EA, or manual setup.
Median $
$13K
5th-95th: $10K – $18K
Drawdown
-18%
median worst case
Ruin risk
3%
chance to lose 50%
Edge (net)
+0.43%
gross: +0.50%
Verdict: Run the calculator to evaluate your bot.
📐 How this works · Sources · Limitations
Method. Monte Carlo simulation using Bernoulli trials per trade with fixed-fractional position sizing. Median + 5th/95th percentiles reported (not mean) to reflect realistic results (Jensen's inequality).
Sources.
- Ralph Vince — The Mathematics of Money Management (1992): fixed-fractional sizing
- Van K. Tharp — Trade Your Way to Financial Freedom: R-multiples, expectancy formula
- Edward Thorp — Mathematics of Gambling: risk of ruin theory
- Stanislaw Ulam — Monte Carlo method (1940s)
⚠ Limitations. Cost (spread + commission + slippage) is included as fixed % of risk amount per trade — adjust based on your broker. Model assumes trades are independent (real markets have correlated streaks). No margin-call rules. For exact dollar predictions use backtesters like MyFxBook, FXBlue, or QuantConnect.
Purpose. Quick directional check — is this bot strategy worth pursuing? Positive verdict ≠ profit guarantee. Always demo-test 1 month before live capital.