Same idea as Stochastic %K but inverted: scale runs from 0 (top) to −100 (bottom). Above −20 = overbought, below −80 = oversold.
%R = −100 × (High₁₄ − C) / (High₁₄ − Low₁₄)
Overbought/oversold reversals, especially when combined with a trend filter (e.g., only take Williams %R longs when MACD is bullish).
Same overbought-persistence issue as other momentum oscillators. The negative scale trips up new users.
Nifty 50 daily bars with Williams %R pre-loaded:
1 strategy uses Williams %R: