🏠 Home 📊 Base Rate 🔬 Methodology ℹ️ About ⚠️ Disclaimer 🇰🇷 한국어(Korean)
← Return to Learning Hub
🔄 Momentum·Stochastic

Complete Guide to Stochastic
— %K·%D·How to Use Overbought

Stochastic shows where the price is located within a certain range over a period of time. It explains how to capture momentum turning points through %K·%D crossovers and reversals from overbought conditions.

💡 Key Takeaway — Look at where the current price is (%K) within a certain range. If it turns back up from oversold, it signals a pullback rebound — strong in sideways markets, but less reliable in strong trending markets.

What is Stochastic?

Stochastic is a momentum indicator that represents where the current closing price is within the high-low range of a certain period on a scale of 0 to 100. It was devised by George Lane, and the core idea is simple — in an uptrend, the closing price tends to close near the high, while in a downtrend, it tends to close near the low.

%K and %D

%K = (Closing Price − N-day Low) ÷ (N-day High − N-day Low) × 100 (default N=14)

  • %K — The fast line of the above formula. Above 80 indicates the upper range (overbought), below 20 indicates the lower range (oversold)
  • %D — The slow signal line that averages %K over 3 days (reducing noise)

A cross of %K above %D (golden cross) is interpreted as a momentum turning buy signal, while the opposite is a sell signal. In particular, a golden cross from oversold (below 20) is considered highly reliable.

Reversal from Overbought — Capturing Pullbacks

The strength of Stochastic lies in its ability to identify pullback points. If it enters oversold during a rising trend and %K turns back up, it becomes an early signal of trend resumption.

Using DawnScan — When Stochastic turns up (stoch_turn_up) from an oversold condition, and the directional indicator (+DI > −DI) is in an upward bias, it scores as a 'pullback rebound' setup.

Warning — Signals are Weaker in Strong Trends

Stochastic works well in sideways and range-bound markets, but in a strong trending market, it can stay overbought (80+) for extended periods, giving false sell signals. Therefore, it is important to also look at trend indicators like RSI (ADX).

Alongside Other Signals

Combine Stochastic (timing) with OBV (supply and demand) and relative strength (strength against the market) for a comprehensive assessment. For the overall trend, refer to pre-breakout early signal overview and methodology.

Warning — Being oversold does not guarantee a rebound (it may drop further in a bear market). All information is for reference only, and investment responsibility lies with the individual.

Check Now

Check today's scan for pullback rebound setup stocks along with other signals.

Frequently Asked Questions

How are Stochastic %K and %D calculated?

%K represents the position of the current closing price relative to the lowest price over the recent N days (default 14 days) on a scale of 0 to 100. The formula is (Closing Price − N-day Low) ÷ (N-day High − N-day Low) × 100. %D is the signal line that is a simple moving average of %K over M days (default 3 days), smoothing out the noise of %K. When %K crosses above %D, it is interpreted as a buy signal.

What is DawnScan's stoch_turn_up?

stoch_turn_up is a DawnScan-specific signal that captures the moment when %K rebounds from the oversold zone (below 20) and crosses above %D. Unlike simply being in an oversold state, it focuses on the actual turning point where momentum shifts from down to up. This signal is more reliable when it appears alongside conditions like RSI below 30 or an increase in vol_trend.

What is the difference between %K and %D?

%K is a sensitive line that immediately reflects the current position, while %D is a smoothed signal line of %K. In practice, %K moves too quickly and has a lot of noise, so the crossover of the two lines is used as a condition. When %K crosses above %D (golden cross), it signals a bullish reversal, and when it crosses below %D (dead cross), it signals a bearish reversal. The slow stochastic is a variation that smooths %K itself to increase reliability.

Does being in an oversold zone guarantee a rebound?

Not necessarily. In a strong downtrend, Stochastic can remain below 20 for extended periods. Being in an oversold zone indicates a higher likelihood of a rebound, but it is not a confirmed turning point. To increase the reliability of a rebound, it is advisable to wait for %K to actually cross %D and to double-check with increased volume or candlestick patterns (like hammer patterns).
📊
RSI Momentum
Confirming Overbought with Stochastic
🧭
ADX Trend Strength
Interpreting Stochastic Based on Trend Strength
💧
OBV Volume Pressure
Confirming Supply and Demand During Momentum Shifts

Recommended Reading