What is the Stochastic Oscillator?

The Stochastic Oscillator in English is a momentum indicator that evaluates the speed and change of price trends by comparing the closing price with the average price within a certain period of time. The stochastic momentum indicator was proposed by George C. Lane in the late 1950s. It mainly consists of two lines: %K line (fast line) and %D line (slow line or signal line). By analyzing the intersection and position of these two lines, it can identify overbought and oversold, and predict the price trend. Among them, the "current closing price" is the latest closing price, and the "highest price (selected period)" and "lowest price (selected period)" are the highest and lowest prices within a period of time respectively. This period is usually 14 days, but can be adjusted as needed. The %K line measures market momentum by reflecting the relative position of price within its recent high and low ranges. The %D line is the moving average of the %K line. The calculation method of the %D line is to take the simple average of the %K line values in the last few periods (for example, 3 periods). For example, if a 3-day cycle is used, the %D line value will be the average of the %K line values for the last three days. This calculation makes the %D line change more smoothly than the %K line, reflecting the mid-term trend of market dynamics. How to use the Stochastic Oscillator? 1. Identify overbought and oversold Overbought zone: When both the %K line and the %D line rise above 80, the market may enter an overbought state, which may mean that the price is about to fall. Oversold zone: When both the %K line and the %D line fall below 20, the market may enter an oversold state, which may mean that prices are about to rise. 2. Cross The intersection of the %K line and the %D line is often considered a buy and sell signal. Buy signal: When the %K line crosses the %D line from below to the upside, especially in the oversold zone (below 20), this is usually considered a buy signal. Sell signal: When the %K line crosses the %D line from above to the downside, especially in the overbought zone (above 80), this is usually considered a sell signal. 3. Deviation Divergence refers to the phenomenon that the stock price movement is inconsistent with the trend of the stochastic oscillator. Divergences are often viewed as potential trend reversal signals. For example, if a stock price makes a new high but the stochastic oscillator fails to reach a new high, this is called a top divergence and may signal a decline in the stock price. Conversely, if the stock price makes a new low but the stochastic oscillator does not, this is called a bottom divergence and may signal an increase in the stock price. What are the limitations of the Stochastic Oscillator? Lag: As an indicator based on historical data, it may lag behind actual changes in the market. False Signals: In markets that are volatile or not trending clearly, the stochastic oscillator can produce misleading signals. Therefore, you need to consider the stochastic oscillator in conjunction with other technical indicators and the fundamentals of the investment target to obtain a more objective judgment. More technical analysis indicators What are Fibonacci retracements? Fibonacci Retracement What are Bollinger Bands? How to use? What is the application accumulation/distribution line? A/D Line What is the Commodity Channel Index CCI? How to use the CCI indicator? What is the Average Trend Indicator ADX? How to use the ADX indicator? What is the Balanced Volume Indicator? How to use the OBV indicator? What is Moving Average MA? Moving Average What is Moving Average Convergence Divergence (MACD)? What is the Money Flow Index MFI?