ForexFin
Free forex tools · no signup

Get the math right before you click buy.

Position sizing, pip value, margin, risk:reward, Kelly, spread cost — eight calculators for retail traders, plus live market data and a trade journal. Built on live ECB rates.

8 calculators  ·  Live ECB rates  ·  No signup  ·  Bookmark & go
Three things, done right

Calculate, watch, and review your trading.

The numbers that decide whether a strategy survives — sizing and cost — plus the live data and the journal that tell you what's actually working.

Eight calculators

Position size, pip value, margin, swap, risk:reward, Kelly, spread cost and a full trade-plan builder — all converting across account currencies with live ECB rates.

Live market data

Market-hours visualizer, currency-strength meter, pair-correlation matrix, and a synthetic DXY with gold, oil and yields — refreshed continuously, citable, no login.

Journal & alerts

A free workspace that scores every trade in R, shows where your edge comes from, and pings you the moment any pair crosses a level you set.

Calculators
Position Size

How many lots to trade so a stop-out costs only your planned risk.

Pip Value

What one pip is worth in your account currency, for any pair and lot size.

Margin

Capital required to open a position at a given leverage.

Swap / Rollover

Estimated overnight financing cost from interest-rate differential.

Risk : Reward

R-multiple, pips at risk, pips at reward — from entry, stop, and target.

Kelly Fraction

Mathematically optimal bet size from win rate and average win/loss.

Spread Cost

How much your broker's bid–ask spread really costs you per trade, day, and year.

Trade Plan Builder

One form, one plan: position size + R:R + Kelly check. Copy the summary or share via URL.

Markets & concepts
Free Trade Journal

Import MT4/MT5 trades by CSV or screenshot, score every trade in R, and see where your edge comes from — across multiple accounts in one view.

Forex Market Hours

Sydney, Tokyo, London, New York sessions in your local time. See what's open right now and when the high-volume overlaps occur.

Currency Strength Meter

Daily strength scores for the eight major currencies — pick pairs by combining the strongest with the weakest.

Pair Correlation Matrix

30-day correlation of daily returns across the ten most-traded pairs. Spot the same-side trap before sizing up.

DXY Dollar Index

Live synthetic DXY from the six ICE-standard component pairs, refreshed every minute. Daily history, formula, and per-component contribution.

Gold (XAU/USD)

Live spot gold per troy ounce with day change, 50/200-day moving averages, and 90-day history — the dollar-and-risk gauge for FX.

Oil (Brent Crude)

Live Brent crude per barrel with moving averages and 90-day history — the macro driver behind CAD, NOK, and the commodity currencies.

US Treasury Yields

The full 1-month-to-30-year curve, updated daily, with the 2s10s spread and 10-year trend — the rate backdrop for every USD pair.

Economic Calendar

This week's high- and medium-impact FX releases — CPI, payrolls, central-bank decisions — with times in UTC.

COT Positioning

Large-speculator net positioning in the major currency futures from the CFTC's weekly report — see who's crowded long or short.

Weekly Strength Reports

A dated archive of G8 currency strength and realized volatility, computed from daily closes. Citable data, refreshed every week.

The Mathematics

The exact formula behind every calculator — position sizing, pip value, the Kelly criterion adjusted for forex leverage, and more.

Forex Concepts

Plain-English explanations of pips, leverage, margin calls, and the things every new trader gets wrong once.

Forex calculator FAQ

The questions traders actually ask.

Position size = (account balance × risk %) ÷ (stop in pips × pip value). Decide the cash you'll risk, divide it by your stop distance times the per-pip value for the pair, and you get the number of lots so a stop-out costs exactly your planned risk. The position size calculator does the currency conversion for you.

Pip value is what a one-pip move is worth on your position. For a standard lot (100,000 units) one pip is the pip size (0.0001, or 0.01 for JPY pairs) × 100,000 in the quote currency, then converted to your account currency at the current rate. See the pip value calculator.

Margin = notional value ÷ leverage. One standard lot of EUR/USD is 100,000 EUR; at 1:30 leverage the margin is about 3,333 EUR, converted to your account currency. EU retail is capped at 1:30 on majors, US retail at 1:50. Try the margin calculator.

Many traders target at least 1:2. At 1:2 you only need about a 33% win rate to break even; at 1:1 you need 50%; at 1:3 even a 25% win rate is profitable. The risk:reward calculator shows the breakeven win rate for any entry, stop and target.

Yes — all calculators and live market-data tools are free with no signup. An optional free account adds a trade journal and price alerts; everything else runs in your browser on live ECB reference rates.

Your free trading workspace.

Log every trade, see your win rate and expectancy in R, and get an email the moment a pair crosses your level. No card, no catch.

Open your workspace