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// MACD.MQ5
What is the MACD indicator?
MACDMomentum
Uses the distance between two moving averages as a measure of momentum, with a histogram for the rate of change.
Three reasons Moving Average Convergence Divergence is still used after decades.
Three layers of information
The MACD line, the signal line and the histogram — each layer answers a different question.
Shows momentum fading
The bars shrink before price reverses, earlier than the crossover signal.
No fixed scale needed
Because it is measured in price units, it reflects the real range of the pair you are viewing.
// READING_SIGNALS
How to read Moving Average Convergence Divergence signals
How MACD produces its number, and what each shape on the chart means.
Formula and how it works
The MACD line = fast EMA (12) minus slow EMA (26) of the close. The Signal line is the EMA (9) of the MACD line itself. Histogram = MACD − Signal, showing the strength or weakness of momentum; MACD crossing above Signal is a bullish signal.
How to use it in an EA
Enter when MACD crosses Signal; use a shrinking histogram as a warning that momentum is fading; MACD–price divergence signals a possible reversal.
Fits when
The market has clear trending swings, enough for the gap between the two averages to widen.
Struggles when
Sideways phases. MACD wraps around the zero line and crossovers appear constantly without leading to any move.
MACD crosses above the signal lineMomentum turns upward; a cross below is the opposite.
CONCEPT ILLUSTRATION · MACD crosses above the signal lineMACD crosses above Signal → rising momentum · MACD 12, 26, 9MACDSignalHistogramZero line
The histogram shrinks toward 0Momentum is weakening, even if price may still be moving on.
CONCEPT ILLUSTRATION · The histogram shrinks toward 0Bars shrink toward 0 → momentum is weakening · MACD 12, 26, 9MACDSignalHistogramZero line
MACD crosses the zero lineThe two underlying averages have just swapped order — the base trend has changed direction.
CONCEPT ILLUSTRATION · MACD crosses the zero lineMACD crosses zero → the two EMAs swap order · MACD 12, 26, 9MACDSignalHistogramZero line
Price makes a lower low, MACD does notBullish divergence, warning that selling pressure is running out.
CONCEPT ILLUSTRATION · Price makes a lower low, MACD does notPrice makes a new high, RSI does not confirm · 12 · 26PriceRSI
Common mistakes
Entering on every crossover. MACD is a lagging indicator, so its signals need a trend filter in front of them.
// PARAMETERS
Recommended MT5 parameters for Moving Average Convergence Divergence
Default values of the sample file; test them for your market and timeframe.
Parameter
Description
InpFast
Fast EMA period (default 12).
InpSlow
Slow EMA period (default 26).
InpSignal
EMA period of the signal line (default 9).
// 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.
📄 macd.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 Convergence Divergence 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 macd.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
58 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 Moving Average Convergence Divergence
How do MACD and RSI differ?+
RSI measures the strength of a move and maps it to a fixed 0-100 scale. MACD measures the distance between two moving averages, in price units, so it has no ceiling. RSI suits sideways markets, MACD suits markets with trending swings.
What is the MACD histogram for?+
Each bar is the difference between the MACD line and the signal line. Shrinking bars mean the two lines are converging, so momentum is weakening — this comes before the actual crossover, so it is an early warning.
Does Moving Average Convergence Divergence 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 Convergence Divergence in an EA, and further reading
Turn Moving Average Convergence Divergence into an automated EA
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.
