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// MOVING_AVERAGE.MQ5
What is a moving average (MA)?
Moving Average (SMA / EMA)Trend
The base indicator of almost every trend system: it flattens price so you can see the real direction.
Three reasons Moving Average is still used after decades.
Readable at a glance
Price above the line is one direction, below it is the other. No complex interpretation needed.
A good filter
Put it in front of another system to remove trades that go against the main trend.
Only one parameter
There is only the period to adjust, so it is very hard to over-optimize it into uselessness.
// READING_SIGNALS
How to read Moving Average signals
How Moving Average (SMA / EMA) produces its number, and what each shape on the chart means.
Formula and how it works
SMA takes the simple arithmetic average of the close over N periods, with every candle weighted equally. EMA gives more weight to recent candles through the factor k = 2/(N+1), so it reacts faster to price moves. Price above the MA usually signals an uptrend, and the opposite for a downtrend.
How to use it in an EA
Use it as a trend filter: only buy when price is above the MA, only sell when price is below it. A crossover of two MAs (fast/slow) is the classic entry signal.
Fits when
The market trends long enough for price to move clearly away from the average.
Struggles when
The market moves sideways in a narrow range. Price keeps crossing back and forth over the MA, and every cross is a false signal and another fee.
Price crosses above the MAThe short-term trend turns up relative to the average of N candles.
CONCEPT ILLUSTRATION · Price crosses above the MAClose moves above the EMA → favor BUY · 14PriceEMA
Fast MA crosses above slow MAThe classic buy entry signal; a cross below is the opposite signal.
CONCEPT ILLUSTRATION · Fast MA crosses above slow MAFast EMA crosses above slow EMA → BUY signal · 14Fast EMASlow EMA
The MA goes flat and price wraps around itNo trend. Every cross during this phase is suspect.
CONCEPT ILLUSTRATION · The MA goes flat and price wraps around itPrice returns to the balance zone · 14Range edgePrice
The MA slope steepensThe trend is strengthening, not just price being higher.
CONCEPT ILLUSTRATION · The MA slope steepensMA slopes up → the uptrend is getting stronger · 14PriceRising MA
Common mistakes
Shortening the period to get earlier signals. That only increases how often the lines cross, not how often they cross correctly.
// PARAMETERS
Recommended MT5 parameters for Moving Average
Default values of the sample file; test them for your market and timeframe.
Parameter
Description
InpPeriod
Number of candles used for the average (default 14).
InpMethod
Calculation type: MODE_SMA (simple) or MODE_EMA (exponential).
// 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.
📄 moving_average.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.
Moving Average 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 moving_average.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
52 lines · 2 input parameters
How it draws
Drawn over the price chart · calculated incrementally, does not redraw the past
An on/off filter. The MA gives the direction, ADX says whether that direction has enough strength to continue — only follow MA signals when ADX is above 25.
Note
This pair fixes the MA's biggest weakness: the run of false signals during sideways phases.
EMA reacts faster because it weights recent candles more, which suits short timeframes. SMA is smoother with fewer false signals, which suits higher timeframes. The sample file has an InpMethod parameter to switch between the two without editing the code.
What MA period is best?+
There is no ready-made best number. 20 and 50 are a common pair for medium-term trends, 200 is the long-term trend mark. More important than the number is keeping it long enough to evaluate, instead of changing it after a few losing trades.
Does Moving Average 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 Moving Average 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.
