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Williams %R (WILLR)

StratCraft indicator page for Williams %R.

Route: /indicators/willr/

What It Does

Williams %R is a momentum oscillator that compares the close to the recent high-low range. It is often used to identify overbought and oversold conditions.

Formula

Williams %R = -100 * (Highest High - Close) / (Highest High - Lowest Low)

Parameters

  • period - default 14
  • upperband - default -20
  • lowerband - default -80

C++23 API

#include <nonabt/indicators/willr.hpp>
auto willr = std::make_unique<nonabt::WILLR>(data(), 14, -20, -80);

Common Usage

  • Use Williams %R to spot overbought and oversold conditions.
  • Combine it with trend filters to avoid fading strong directional moves too early.
  • Similar in spirit to Stochastic, but centered on the close within the high-low range.

Practical Pattern

When Williams %R is near -80, the market may be oversold; near -20, it may be overbought.

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