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Currency Strength Meter

Turn a set of pair percentage changes into a relative currency ranking by adding moves to the base currency and subtracting them from the quote currency.

Pair changes

One pair per line: BASE/QUOTE, percent change from the chosen window start. JPY must use percent change, not raw points.
For pair XXX/YYY with pct change delta: strength[XXX] += delta; strength[YYY] -= delta.

Strength ranking

Strongest currency—
Method—
CurrencyScoreBand
Currency strength scores have no industry-wide standard; compare relative rank only.
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Educational tools for non-US traders · not directed at US persons.

Quick answer

A simple currency strength meter decomposes each pair move: if XXX/YYY changes by delta percent, add delta to XXX and subtract delta from YYY. The result is a relative ranking only. There is no single industry-standard strength formula.

How it works

What this strength meter measures

This tool ranks currencies from pair percent changes over a chosen window. It is source-neutral: you provide the pair changes, and the engine only decomposes each pair into base and quote currency contributions.

The base/quote rule

For each pair XXX/YYY with percentage change delta:

strength[XXX] += delta

strength[YYY] -= delta

If EUR/USD rises 1.0%, EUR gets +1.0 and USD gets -1.0. If USD/JPY rises 0.5%, USD gets +0.5 and JPY gets -0.5.

Sum versus average

The sum method keeps the signed total for each currency. The average method divides by how many entered pairs included that currency. Average can be useful when the input set is incomplete and some currencies appear more often than others.

Worked example

With EUR/USD = +1.0% and USD/JPY = +0.5%, EUR scores +1.0, USD scores -1.0 + 0.5 = -0.5, and JPY scores -0.5. EUR is the strongest in that small window. The signed scores sum to zero in this simple closed set, subject to normal rounding.

Important limitations

Currency strength has no single industry-wide formula. Different tools use percent change, RSI, moving averages, normalization or proprietary weighting. Use this output as a relative ranking for one chosen window, not as a universal score. For JPY pairs, use percentage returns, not raw point moves.

Frequently asked questions

Is there one standard currency strength formula?
No. Strength meters differ by data source, window, normalization and indicator method. This tool uses transparent percent-change decomposition.
Should I use raw JPY points?
No. Use percentage change for every pair, including JPY pairs. Raw points are not comparable across currencies or price scales.
Why do the simple scores sometimes sum to zero?
Every pair adds the same amount to one currency and subtracts it from another, so a closed simple percent-change decomposition nets to about zero before rounding.
What window should I use?
That is a modeling choice. A session window, daily open, weekly open and rolling lookback can all give different rankings.
Is the strongest currency a buy signal?
No. It is only the strongest relative score in the entered sample. It does not include spread, volatility, trend quality, news risk or trade setup quality.

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