Using the PSY Indicator for Overbought and Oversold Signals
Summary
The PSY, or psychological line, measures the percentage of days in a lookback window on which price rose. Its moving average, PSYMA, smooths that percentage over time. The document treats readings from 25 to 75 as a normal range and describes values above 85 or below 15 as stronger overbought or oversold conditions, respectively. It proposes preparing to sell at high extremes and buy at low extremes, while also watching whether the indicator turns or crosses its moving average.
Additional rules use PSY and PSYMA direction and crossovers: rising lines or an upward crossover are treated as bullish, and falling lines or a downward crossover as bearish. A pullback that holds above PSYMA is described as a possible continuation setup; tightly intertwined lines in a narrow range suggest standing aside. These are heuristic technical signals. The document provides no evidence from testing and does not address parameter selection, risk controls, or how the rules behave across markets, so the thresholds should not be read as validated forecasts.
Key ideas
- PSY is the share of up days in a specified lookback window, expressed as a percentage.
- PSYMA smooths the PSY reading by averaging it across days.
- The document treats readings above 85 as overbought and below 15 as oversold, with buy and sell implications.
- PSY and PSYMA direction and crossovers are used for trend and timing signals.
- Closely intertwined lines in a narrow range are interpreted as a reason to wait.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.