How to use a stochastic oscillator: a beginner's guide

Updated October 23, 2026

Learning how to use a stochastic oscillator takes about an afternoon. The indicator is popular for a reason. It is simple to read, and it marks entry and exit points that are otherwise easy to miss on a busy chart.

This guide covers what the indicator is, how it is calculated, the two setups that actually produce trades, and the settings worth changing. Nothing works all the time, so you will also see when to leave the stochastic alone.

What is the stochastic oscillator indicator?

The stochastic oscillator is a technical indicator developed in the 1950s by George Lane. Technical indicators are a part of technical analysis; a field of study that analyzes how prices move in an attempt to profit from that knowledge.

The indicator was designed to track the speed of price movements. That makes it a momentum indicator: it follows momentum rather than the direction of price.

So how does this help us? Momentum changes often occur before price changes. Therefore, the stochastic oscillator can tip traders off to a potential reversal in price.

This can be useful for getting out of an uptrend before the price reverses, for example, or entering during a pullback as the price is about to move back in the trending direction. The indicator is also used to identify overbought and oversold levels.

When momentum gets too hot, this often results in the price moving in the other direction for a while. Prices rarely go vertical for long, so the stochastic oscillator can help you identify when the price might be overcooked and ready for a move the other way.

The indicator moves between 0 and 100. Readings above 80 are considered overbought, and readings below 20 are considered oversold. However, this is too simplistic for trading purposes. We’ll discuss some better methods for determining when the price is going to reverse below.

Momentum changes, called divergence, and overbought or oversold levels give you two separate strategies. Both are worked through below, with charts.

Stochastic oscillator strategy: divergence

The stochastic measures momentum. If it spikes to 98 as the price rallies, but on the next rally it only reaches 80, that shows the price is struggling to move with the same momentum to the upside that it was before.

This may or may not be reflected in the price moves, but is nonetheless a warning sign to avoid buying call options, or potentially start watching for puts. When the price reaches or exceeds a prior swing high in price, while the stochastic oscillator does not, that is called negative divergence. It’s a warning sign that the uptrend may be exhausted.

What is the Stochastic Oscillator Indicator?

The same concept applies to the stochastic oscillator making a higher low when the price reaches or drops below its prior swing low.

Here’s an example on the 1-minute chart where Tesla (TSLA) has a big rally and the Stochastic reaches 95.91. On the next rally, the Stochastic reached 98.62. The price on the second rally nearly reaches the prior high. No divergence yet. On the third rally, the price reaches the prior high, but the stochastic only reaches a high of 92.2.

Once this occurs, enter a put trade as the price drops below the prior candlestick low. The short trade occurred just below $225 on the large red candle.

Since this is a 1-minute chart, the strategy is useful for expiries that are one to several minutes away. The strategy is capturing a price reversal as momentum is fading, but it is unknown how long the price reversal will last.

This strategy utilizes both price action and the indicator. Divergence trades don’t occur very often on intraday charts, which limits its usefulness. Stochastic divergence is more common on daily charts.

Here is a daily chart of Tesla. The Stochastic indicator is moving up as the price forms a new low. When you see this, you can consider placing a call trade when and if the price moves above the prior candlestick high.

Once we can see the divergence, which shows selling is slowing AND the price clears above the high of the prior candle, you should consider a call or long trade.

Without further analysis, it is unknown how long the rally will last. Therefore, expiries one to two days out are best for daily chart signals.

For reference, the Stochastic Oscillator is the blue or faster moving line on the charts above. The orange line, which is slower, shows the moving average of the Stochastic. For the divergence strategy, only the Stochastic Oscillator reading matters.

Stochastic oscillator overbought and oversold strategy

A Stochastic of 100 means the price is at the highest level seen over the last 14 periods. A reading of 0 means the price is at the lowest level seen over the last 14 periods.

Below 20 is called oversold and above 80 overbought. That does not mean you should act. It only means price is trading in the lower or upper portion of the last 14 periods. What is more interesting is the move out of that zone, especially when a visible trend is running. Here is what I mean.

When the price is declining, the oscillator will often struggle to reach 50, let alone 80. When the price is trending higher, the oscillator will often struggle to fall to 50, let alone 20. So how should this inform your next move?

When you can visually see that the price is dropping, watch for the Stochastic oscillator to reach 50 to 70.

The price reaches

Wait till the Stochastic turns lower and the price drops below the prior candlestick low. Enter a put trade with an expiration of one minute to a few minutes away.

If the stochastic shoots above 80, I would avoid this strategy until you see the price falling again. You’re watching for the indicator to move into the 50 to 70 range and then take a dip. Let’s look at an example on the EURUSD 1-minute chart, for all the forex traders out there.

For the first trade, the price has been dropping. The stochastic moves above 50 and turns lower, but ultimately the price keeps going up. Losing trades happen. No worries.

“In this business, if you’re good, you’re right six times out of ten. You’re never going to be right nine times out of ten.” - Peter Lynch

The prior candlestick high

The price continues lower so we start looking for signals again. The next two trades are winners as the price moves to the downside; it doesn’t return to the entry point within several minutes.

The price rallies and the stochastic shoots above 80. You should not trade at this point, until you have mastered how to trade uptrends, which is covered next.

“There is a time to go long, a time to go short, and a time to go fishing.” - Jesse Livermore

As the price starts falling again, look for the signals. Two more short trades or put signals occur as the stochastic reaches 50 (but not above 70) and then turns lower while the price drops below the low of the prior candle.

For going long, we want to see the price rising.

We are looking to buy when the price pulls back between 50 and 30 levels on the stochastic.

Buy when the price moves above the high of the prior candle and the stochastic makes an upward turn.

The expiry should be one to a few minutes away (or one to a few candles away, depending on the chart time frame you are trading).

This strategy does take some practice. When I started trading 18 years ago, I used to have a stochastic on my chart. I used it as a general guide to alert me when the price was pulling back within the trend. Over time, I have learned to see it without using the indicator, but early on, it can help train your eye to spot some trading opportunities.

I like this strategy because it highlights that are overbought and oversold levels can vary based on the trend. During an uptrend, 50 to 30 is often oversold and ready to bounce. During a downtrend, 50 to 70 is often overbought and really to sell off.

You do not actually need the more extreme levels of 20 and 80 to give us signals. For more strategy ideas, learn these classic chart patterns.

How is the stochastic oscillator calculated?

The stochastic oscillator shows us the location of the current price relative to how far the price has moved over a defined number of price bars or candles.

By default, the indicator looks back at 14 periods. On a daily chart, this is 14 days, on a 1-minute chart, this is 14 minutes.

Here is the stochastic oscillator formula.

%K = (Current Price - Low) / (High - Low) * 100

%D = 3-period simple moving average of %K

Low = the lowest price over the last 14 periods

The forex traders out there

High = the highest price over the last 14 periods

3-period simple moving average = the last three %K values summed up and then divided by 3

Run the numbers once and it stops being abstract. Say the last 14 candles on EUR/USD put the high at 1.0940 and the low at 1.0860, and the current close is 1.0916. The range is 80 pips. Price sits 56 pips above the low. That gives a %K of 56 divided by 80, times 100, which is 70. Now take the two previous %K readings, 62 and 55, add the new 70 and divide by three. %D comes out at 62.3. So price sits in the upper third of its two-week range, and %K is above %D, which means the push is still going.

Understanding how the indicator is structured is beneficial. From the calculation, we can see the indicator is showing us where the current price is relative to the high and low over the last 14 periods.

The chart time frame

Best stochastic oscillator settings

The default stochastic oscillator setting is 14, meaning the indicator is assessing where the current price is relative to the high and low of the last 14 periods or price bars. This may not be the best setting for you.

Decreasing the number of periods, to five for example, will cause the indicator to move up and down more quickly. This may be useful for people who want to make quick trades and get more trading signals.

How is the Stochastic Oscillator Calculated?

Increasing the number, to 20 for example, will make the indicator move up and down more slowly. There will be fewer overbought and oversold readings, but potentially more divergence signals.

Common mistakes with the stochastic oscillator

Treating 80 and 20 as buy and sell buttons. In a strong trend the indicator can sit above 80 for hours while the price keeps climbing.

Trading divergence with no price trigger. Wait for the break of the prior candle high or low before you commit.

Hunting divergence on a 1-minute chart. It is rare there. Daily charts produce it far more often.

Leaving the lookback at 14 when your holding time does not match it. Five periods suit fast trades, 20 suits slower ones.

Reading the slower orange %D line as the signal. For divergence, only the %K line matters.

Stacking three more oscillators next to it. They measure the same thing and will happily agree with each other at the wrong moment.

Bottom line

The stochastic is a timing tool, not a decision tool. Direction comes from the trend and from the price action in front of you. What the indicator adds is a read on whether the pullback inside that trend has run out of steam. In an uptrend, treat 50 to 30 as the zone to buy. In a downtrend, treat 50 to 70 as the zone to sell. Keep the 14-period default until you have a concrete reason to change it.

Practice on a demo account for a few weeks before any money is at stake, and count the losing trades honestly. MetaTrader and most web terminals ship the stochastic by default, so nothing needs installing. If you do not have an account yet, our list of regulated brokers is a sensible place to start, and the broker comparisons there set out spreads and minimum deposits side by side. This guide was updated in 2026.

FAQ

What is a stochastic oscillator?

It is a momentum indicator built by George Lane in the 1950s. It plots where the current price sits inside the high and low range of the last 14 periods, on a scale from 0 to 100. A reading of 100 means price is at the top of that range, 0 means the bottom.

What are the best stochastic oscillator settings?

The default is 14 periods with a 3-period average, and it works for most traders. Drop it to five and the line swings faster, which gives more signals and more noise. Raise it to 20 and you get fewer overbought and oversold readings but cleaner divergence.

How do I start using a stochastic oscillator?

Add it to a chart you already read well, then watch it for a week without trading. Note the trend direction first. In a downtrend, look for the line to reach 50 to 70 and turn down, then wait for price to break the prior candle low before you enter.

What are the most common mistakes?

Buying every reading under 20 and selling every reading over 80. In a strong trend the indicator stays pinned at one end for hours. The second common error is taking a divergence signal without waiting for price to confirm it by breaking the previous candle high or low.

Is the stochastic oscillator suitable for beginners?

Yes, and that is much of its appeal. There is one number to read and two lines to watch. The catch is that it trains you to see pullbacks rather than to pick direction, so pair it with a clear view of the trend before you place anything.