Williams %R

Williams %R is a momentum oscillator developed by Larry Williams that measures the level of the closing price relative to the highest high over a specified lookback period. It is calculated as: ((Highest High − Current Close) / (Highest High − Lowest Low)) × -100. The result is an oscillator that ranges from 0 to -100, where readings near 0 indicate that the current close is near the top of the recent range — considered overbought — and readings near -100 indicate the close is near the bottom of the range — considered oversold. This inverted scale is one of the defining quirks of the indicator, and users should be careful not to confuse its directional logic with other oscillators.

Typical overbought and oversold thresholds are set at -20 and -80 respectively. When the indicator rises above -20, the asset may be overextended and due for a pullback or reversal, generating a potential sell signal. When it drops below -80, the asset is considered deeply oversold and a bounce or reversal may be imminent, suggesting a potential buy. In strongly trending markets, Williams %R can remain in overbought or oversold territory for extended periods without reversing — a phenomenon known as "failure swings" — which is why many traders use it as a confirmation tool rather than a primary signal.

For automated crypto trading, Williams %R is a fast and transparent oscillator that responds quickly to changes in the price range, making it useful for short-term and intraday strategies on volatile assets. Because its calculation is entirely based on the current close's position within the recent high-low range, it provides an immediate gauge of where price stands in its current swing. Bot traders frequently pair Williams %R with a trend filter such as an EMA or ADX — only acting on oversold readings in an established uptrend and overbought readings in a downtrend — to align the mean-reversion signals with the broader directional bias.