Williams %R API — Momentum Extremes in Real Time
WilliamsR_14 ranges from -100 to 0. Values above -20 signal overbought; below -80 signal oversold. Pull it from a single GET.
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What is the Williams %R API?
Williams %R (developed by Larry Williams) measures where the current closing price sits within the high-low range of the past 14 periods. It scales from 0 (at the top of the range, overbought) to -100 (at the bottom, oversold) — the inverse of Stochastic %K. Readings above -20 signal overbought conditions; below -80 signals oversold. TickAtlas pre-calculates WilliamsR_14 from live broker terminal data and includes the zone classification in every response.
One Request. Instant Data.
curl -X GET \
"https://tickatlas.com/v1/indicator?symbol=EURUSD&indicator=WilliamsR_14&timeframe=H1" \
-H "X-API-Key: YOUR_API_KEY"Why Use TickAtlas?
Pre-Calculated, Sub-100ms
Indicator values are computed server-side on every new candle. Your app queries the result — no TA library, no candle history needed.
7 Timeframes
M1, M5, M15, M30, H1, H4, D1 — the same endpoint serves scalpers and position traders alike.
Forex, Crypto, Commodities
EURUSD, GBPUSD, XAUUSD, BTCUSD, USDJPY — data available for all symbols active on connected broker terminals.
Plug into any stack
- ChatGPT Custom GPTs
- Claude Tools
- Python / pandas
- Node.js
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Frequently Asked Questions
Why does Williams %R go from -100 to 0, not 0 to 100?
Williams %R is an inverted scale. A value of 0 means the current close is at the very top of the 14-period range (most overbought). A value of -100 means the close is at the very bottom (most oversold). This is the opposite of Stochastic %K.
How is Williams %R different from Stochastic %K?
They measure the same concept (close relative to the high-low range) but scale inversely. Williams %R is typically unsmoothed (raw), while Stochastic applies smoothing. Williams %R tends to react faster, making it useful for short-term turning points.
Can Williams %R be used as a trend filter?
It's primarily a momentum oscillator for short-term overbought/oversold detection. For trend filtering, ADX is more appropriate. A common combination: Williams %R below -80 (oversold) combined with ADX above 25 (trending) = high-probability mean-reversion entry in a trending market.
What symbols work best with Williams %R?
Williams %R works on any symbol — it's purely price-range based. Major Forex pairs (EURUSD, GBPUSD), gold (XAUUSD), and crypto (BTCUSD) all produce clean signals on H1 and H4. Use GET /v1/symbols to see the full list of supported symbols.
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