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// STOCHASTIC.MQ5
What is the Stochastic oscillator?
Stochastic OscillatorMomentum
Compares the close with the full range of the last N candles to show where price sits within that range.
Compares the close with the recent high–low range to measure momentum and overbought/oversold zones.
EMA 14Illustrative data — not real market data, not a trading signalEMA 14Illustrative data — not real market data, not a trading signal
Illustrative signals of the rule on simulated data — not a trading recommendation.
Rule: %K crosses above %D in the zone below 20: buy; crosses below in the zone above 80: sell. Entry = close of the signal candle; SL = entry ∓ 1.5 × ATR(14); TP1/TP2/TP3 = 1R/2R/3R.
CONCEPT ILLUSTRATION · Signal rule: %K crosses above %D in the zone below 20: buy; crosses below in the zone above 80: sell.%K crosses %D in the extreme zone · K 14 · D 3%K%D8020
Three reasons Stochastic Oscillator is still used after decades.
More sensitive than RSI
It reacts earlier to short-term changes, which suits intraday trading.
Two confirming lines
The %K and %D cross creates a second layer of confirmation instead of a single threshold.
Suits ranging markets
Very effective when price moves within a defined range.
// READING_SIGNALS
How to read Stochastic Oscillator signals
How Stochastic Oscillator produces its number, and what each shape on the chart means.
Formula and how it works
Raw %K = 100 × (close − lowest low of N periods) / (highest high − lowest low). Slow %K is the SMA of raw %K, and %D is the SMA of slow %K. Values above 80 are overbought, below 20 oversold.
How to use it in an EA
Enter when %K crosses %D in an extreme zone; combine with the main trend to avoid noisy signals in a strong one-way market.
Fits when
The market moves sideways, with a relatively clear upper and lower boundary.
Struggles when
A strong trend. The indicator stays saturated in the extreme zone for many sessions and keeps suggesting trades against the trend.
%K crosses above %D in the oversold zoneThis indicator's usual buy signal.
CONCEPT ILLUSTRATION · %K crosses above %D in the oversold zone%K crosses %D in the extreme zone · K 14 · D 3%K%D8020
Both lines above 80The close is in the upper part of the recent range.
CONCEPT ILLUSTRATION · Both lines above 80Both %K and %D above 80: price is near the top of its recent range · 14 · 3%K%D8020
Both lines stuck together, flat in the extreme zoneThe trend is very strong — this is when the indicator is most misleading.
CONCEPT ILLUSTRATION · Both lines stuck together, flat in the extreme zoneBoth lines stuck together for long: strong trend, false reversal signals are likely · 14 · 3%K%D8020
Common mistakes
Using it alone in a trending market. It always needs a trend filter in front to know which direction is allowed.
// PARAMETERS
Recommended MT5 parameters for Stochastic Oscillator
Default values of the sample file; test them for your market and timeframe.
Parameter
Description
InpK
Raw %K period (default 14).
InpSlow
%K smoothing period (default 3).
InpD
SMA period for the %D line (default 3).
// INSTALL
Put the indicator into MetaTrader 5
Four steps, no software needed besides MT5.
01Download the .mq5 file
Click the download button above; the file saves to your computer under the indicator's name.
02Open the data folder
In MetaTrader 5 choose File → Open Data Folder, then go to MQL5/Indicators.
03Compile
Open the file in MetaEditor and click Compile. No errors means the indicator is ready.
04Drag it onto the chart
Go back to MT5, refresh the Navigator and drag the indicator onto the price chart.
📄 stochastic.mq5
DinexSpace wrote this file from the indicator's public formula, not from any commercial source. You are free to edit and reuse it.
// THE_DIFFERENCE
How it differs from MetaTrader 5's built-in indicator
The short answer: the formula is not different. What differs is what you can do with it.
Stochastic Oscillator here gives exactly the same number as MetaTrader 5's built-in version — on purpose. The four points below are what differs, and all four can be read from the very stochastic.mq5 you download.
Calls a built-in indicator
No — the calculation sits in OnCalculate and can be copied straight into an EA
External libraries
Not a single #import declaration
Code length
64 lines · 3 input parameters
How it draws
A separate window below the price chart · calculated incrementally, does not redraw the past
Frequently asked questions about Stochastic Oscillator
How is Stochastic different from RSI?+
RSI compares gains with losses over N candles. Stochastic compares the close with the full high–low range of N candles. Stochastic is more sensitive, so it gives more signals, with more noise.
What are the %K and %D lines?+
%K is the base value, %D is a moving average of %K, so it is smoother and slower. The signal usually used is %K crossing %D in the overbought or oversold zone, adding a layer of confirmation compared with just looking at the threshold.
Does Stochastic Oscillator on this page use real or simulated data?+
The chart on this page uses a deterministic simulated candle series; it is not market prices or trading results.
Using Stochastic Oscillator in an EA, and further reading
An indicator draws signals, but when to enter, where to stop out and how much to risk are still your set of rules. Send those rules and DinexSpace builds them into an EA.
