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📻 All broadcasts & Podcast page • RSS For listening purposes only • Fictional AI servers • For informational purposes, not investment advice.

Weekend Market School

2026-09-19Lesson 3/26 • Oscillator • Fictional AI instructor
Stochastic %K — speed and positionschematic — representstime →80 / 20IndicatorOut of band overbought zone • potential reversal signal
Figure: Stochastic %K — schematic representation for educational purposes (not real market data)

Today's Lesson: Stochastic %K

Greetings! Welcome to the Weekend Stock Market School. Today, we'll learn how to measure the market's "breath". This is a great tool that helps you understand how fast the market is moving and where the price stands within the last 14 days.

1. What is it? (With a Simple Analogy)

Imagine there's an exam at school. There are 14 minutes left until the exam ends. You've opened your exam paper and can see your current answer. Stochastic %K tells you how many "wrong" or "right" answers you've given to the questions on this paper. In other words, where does the current price stand within its range over the last 14 days? It calculates this as a percentage.

2. Why is it important?

What does this information provide for the investor? The Stochastic %K captures moments when the price is "stuck" or "has moved too far". The market generally revolves around "fair value". This oscillator shows us the probability of the price returning when it moves far from this balance (when it's too expensive or too cheap). This is critical for risk management and position-taking decisions.

3. How to Read / Use?

Stochastic %K generally moves between 0% and 100%. The most commonly used thresholds are 20% and80%tir.

Usage Logic: % Be cautious when it goes above 80, and try your luck when it goes below 20%.

4. Real Example

When we look at today's data, the general market atmosphere seems a bit "stuck". Let's look at one of the most active stocks:

5. Common Mistakes

  1. Relying on a Single Indicator: If you only look at the %K chart and buy because it's "oversold", you can suffer significant losses if the trend is still downward. Please use it in conjunction with %D (smoothing line).
  2. Ignoring the Trend Effect: While the 80 and 20 levels are used more frequently in a sideways trend, it's normal for %K to go above 80 in a strong uptrend. Don't overlook the trend.
  3. Lagging Nature: Since Stochastic is an oscillator, when the price reaches its peak, %K may already be above 80. That's why don't follow the "last point", follow the "journey".

6. Mini Test

Shall we take the test? I've hidden the answers below.

  1. When the Stochastic %K value goes above 80, what is typically expected in the market?
  2. % What is expected when it goes below 20?
  3. The DSTKF stock had a 9.98% drop in daily movement. What does this situation typically show on the %K chart?

Answer Key:
1. Overbought and the possibility of a price dip.
2. Oversold and the possibility of a price rise.
3. Being well below 20 (being in the oversold zone).

7. Summary

This lesson is for educational purposes, not investment advice.

Practice with real data: The table below comes from today's technical scan — you can click on a cell to see the name/formula bar, and sort by clicking on column headers.

📊 TECHNICAL-SCAN.XLSXreal BIST technical scan2026-09-18
—
forex
Click on a cell…
1StockLast (TL)Daily %60-Day %Channel %Correlation rSignal
DSTKF1,984.00-9.98% ▼-41.99%57%-0.54STRONG SELL
SASA2.32-4.13% ▼-7.57%21%+0.14STRONG SELL
GUBRF443.50+3.32% ▲-7.12%22%+0.48STRONG SELL
ASTOR248.10-2.90% ▼-16.95%-8%-0.06STRONG SELL
YKBNK36.24+2.60% ▲-10.52%63%-0.11STRONG SELL
GARAN129.60-2.19% ▼-5.81%46%-0.02STRONG SELL
SAHOL88.80-1.99% ▼-8.45%34%+0.02STRONG SELL
ASELS372.25-1.97% ▼-0.33%25%+0.45STRONG SELL
TCELL97.25-1.92% ▼-11.99%38%-0.79STRONG SELL
PGSUS147.50-1.80% ▼-18.37%68%-0.86STRONG SELL
THYAO284.75-1.56% ▼-13.32%42%-0.91STRONG SELL
AKBNK70.45-1.54% ▼-8.74%54%-0.03STRONG SELL
KCHOL215.80-1.33% ▼+10.72%19%+0.89NEUTRAL
AEFES18.83-1.31% ▼-9.12%55%-0.68STRONG SELL
TRALT50.20+1.29% ▲+6.40%35%+0.33SELL
TUPRS417.25+1.27% ▲+90.35%21%+0.97BUY
EKGYO19.00-1.25% ▼-8.65%42%-0.17STRONG SELL
FROTO76.55-1.16% ▼-11.35%38%-0.57STRONG SELL
ISCTR13.22-1.12% ▼-9.33%73%-0.45STRONG SELL
SISE39.78-1.00% ▼-10.08%46%-0.55STRONG SELL
TOASO284.25-0.96% ▼-15.28%79%-0.53NEUTRAL
KRDMD44.50+0.95% ▲+12.94%28%+0.76NEUTRAL
TAVHL276.25+0.91% ▲-2.17%62%0.00SELL
EREGL36.46+0.89% ▲-9.57%39%-0.69STRONG SELL
TTKOM52.45-0.66% ▼-13.59%57%-0.65STRONG SELL
ENKAI85.35-0.47% ▼-4.85%51%-0.53STRONG SELL
PETKM21.44-0.46% ▼+10.97%43%+0.51NEUTRAL
VAKBN33.10+0.30% ▲+2.60%49%+0.42NEUTRAL
BIMAS419.00+0.24% ▲+12.26%42%+0.87NEUTRAL
MGROS523.50-0.19% ▼-24.57%59%-0.91SELL
Technical ScanSource: data/teknik/2026-09-18.json
30 record7 columnAvg. daily: -0.94%Most active: DSTKF -9.98%Click on column header to sort
Cell values come from the real technical scan dated 2026-09-18 (BIST 30). Channel %: the price's position within the 60-day range • r: Pearson correlation. For educational purposes; not investment advice.

Previous lessons: September 13, 2026, Sunday 12 September 2026, Saturday

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