MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
Pattern
Pattern is a MetaTrader 4 Indicator source file. Static analysis documents its declared MQL event and resource structure, 0 exposed input declarations, and 0…
Free MQL4 and MQL5 Source Code Downloads
Browse free MQL source code for MetaTrader 4 and MetaTrader 5 through the B123 Quant library. The collections separate Expert Advisors from indicators and general download intent from editable MQ4 or MQ5 source-code intent, so traders can reach the most relevant platform and resource type quickly.
Source-code analysis only. No backtest or live-performance claim is provided.
Free MetaTrader source libraries
Use the general download collections to compare available resources, installation steps, platform compatibility, account access, and private delivery. Use the source-code collections when you want editable files, detected inputs, event handlers, dependencies, diagnostic status, and code-specific risk notes.
- Free MT4 EA downloads for MetaTrader 4 Expert Advisor discovery and installation.
- Free MT5 EA downloads for MetaTrader 5 Expert Advisor discovery and installation.
- Free MT4 indicator downloads for editable MT4 indicator resources.
- Free MT5 indicator downloads for MetaTrader 5 indicator resources.
- Free MT4 EA source code with MQ4 structure and diagnostic evidence.
- Free MT5 EA source code with MQ5 structure and diagnostic evidence.
- Free MT4 indicator source code with buffers, inputs, and dependency notes.
- Free MT5 indicator source code with MQ5 event and plot analysis.
How resources qualify for the public library
Original files remain immutable. A published derivative is created separately, non-runtime author URLs and contact details are replaced with the B123 site URL, and functional WebRequest or runtime API endpoints are preserved when changing them would alter behavior. Exact duplicates consolidate into one canonical family rather than creating repeated search pages.
Diagnostic status is shown so users know what may need work. A source can be marked compile passed, compile failed, dependency missing, legacy source, or compile not run. Compilation confirms only syntax and available dependencies in one isolated environment; it never proves trading performance or live-account suitability.
What each product page documents
Each family page identifies the platform, resource type, source format, detected handlers and components, exposed inputs, dependencies, sanitization status, compilation result, installation workflow, and operational risks supported by static evidence. Pages do not invent profit, drawdown, win rate, broker, symbol, timeframe, prop-firm, or non-repainting claims.
Private download access
Product pages and collection pages are public, while source packages use registered WooCommerce accounts and private download permissions. Each account may claim three distinct free-source products per site day. Each granted permission allows three download attempts and expires after 30 days. Raw ZIP paths, account pages, and private delivery endpoints are not search landing pages.
Need a ready-to-use EA instead of source code?
Free source is useful for study and testing, but it may require compilation, missing includes, syntax changes, broker-specific setup, or risk review. Traders who do not want to edit code can compare paid BBTrading products with clearer setup notes, private delivery, and available backtest evidence. Paid products are separate from this free library and should be evaluated on their own product evidence and risk notes.
Want this source checked or fixed?
If a file does not compile or you are unsure how to install it, use the diagnostic label and dependency list when contacting B123. A support conversation can identify whether the problem is a missing include, old MQL syntax, platform mismatch, or configuration issue. No repair or live-trading outcome is guaranteed.
Questions
Are these MQL files free to download?
Yes. A registered account is required so WooCommerce can grant a private zero-total order permission and enforce the daily quota.
Does a compile pass mean an EA is profitable?
No. Compilation checks code and dependencies only. It is not a backtest, live result, or profitability verification.
Why might a source file fail to compile?
Common causes include missing MQH dependencies, old language syntax, unavailable custom indicators, or differences between MetaEditor builds. The product page shows the known diagnostic status before download.
Can the source code be modified?
The downloadable MQ4 and MQ5 derivatives are editable, but every modification requires independent review, compilation, and demo testing.
Are functional API addresses removed?
No. Detected runtime endpoints are preserved when replacement could break WebRequest, licensing, news, or other executable network behavior.
Free MQL Source Code Library
Browse free MQ4, MQ5, and MQL source downloads
Use the library to find free MetaTrader source-code pages with diagnostic labels, account-based private delivery, and paths to ready-to-use BBTrading products.
2,015 live resources
1,151 MT4 / MQ4
864 MT5 / MQ5
1,151 MT4 / MQ4
864 MT5 / MQ5
2,015 matching source pages
Claim limit: 3 distinct free resources per account day
Need ready-to-use EAs?
Claim limit: 3 distinct free resources per account day
Need ready-to-use EAs?
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
Geo Fractal
Geo Fractal is a MetaTrader 4 Indicator source file. Static analysis documents Trend, 5 exposed input declarations, and 0 include dependencies.Source-code analysis only. No…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
Gann Swings Xvi Indicator
Gann Swings Xvi Indicator is a MetaTrader 4 Indicator source file. Static analysis documents Breakout, 4 exposed input declarations, and 0 include dependencies.Source-code analysis…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
CANDLESTICK
CANDLESTICK is a MetaTrader 4 Indicator source file. Static analysis documents Moving Average, 3 exposed input declarations, and 0 include dependencies.Source-code analysis only. No…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
ADX Fractal Signals Indicator
ADX Fractal Signals Indicator is a MetaTrader 4 Indicator source file. Static analysis documents ADX, CCI, 5 exposed input declarations, and 0 include dependencies.Source-code…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
Heijden MAC3D
Heijden MAC3D is a MetaTrader 4 Indicator source file. Static analysis documents Moving Average, Grid, Trend, 22 exposed input declarations, and 0 include dependencies.Source-code…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
ZIGZAG FRACTALS
ZIGZAG FRACTALS is a MetaTrader 4 Indicator source file. Static analysis documents its declared MQL event and resource structure, 0 exposed input declarations, and…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
Fozzy Alert
Fozzy Alert is a MetaTrader 4 Indicator source file. Static analysis documents RSI, 5 exposed input declarations, and 0 include dependencies.Source-code analysis only. No…
MT4 / MQ4
Indicator
Missing dependencies
Indicator
Missing dependencies
YJ64GUA
YJ64GUA is a MetaTrader 4 Indicator source file. Static analysis documents Moving Average, ATR, 0 exposed input declarations, and 1 include dependency.Source-code analysis only….
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
Awesome Signal Oscillator
Awesome Signal Oscillator is a MetaTrader 4 Indicator source file. Static analysis documents Moving Average, 6 exposed input declarations, and 0 include dependencies.Source-code analysis…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
MaBased ZigZag
MaBased ZigZag is a MetaTrader 4 Indicator source file. Static analysis documents Moving Average, 8 exposed input declarations, and 0 include dependencies.Source-code analysis only….
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
Clusterbox Ad
Clusterbox Ad is a MetaTrader 4 Indicator source file. Static analysis documents Grid, File Access, 18 exposed input declarations, and 0 include dependencies.Source-code analysis…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
DeMark lines
DeMark lines is a MetaTrader 4 Indicator source file. Static analysis documents Breakout, Trend, 18 exposed input declarations, and 0 include dependencies.Source-code analysis only….
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
Forex News Indicator
Forex News Indicator is a MetaTrader 4 Indicator source file. Static analysis documents Session or Time Filter, File Access, DLL Import, 44 exposed input…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
MA TREND MultiPair
MA TREND MultiPair is a MetaTrader 4 Indicator source file. Static analysis documents Moving Average, MACD, Trend, 0 exposed input declarations, and 0 include…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
Atm Master Candle
Atm Master Candle is a MetaTrader 4 Indicator source file. Static analysis documents its declared MQL event and resource structure, 19 exposed input declarations,…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
4 MA Channel
4 MA Channel is a MetaTrader 4 Indicator source file. Static analysis documents Moving Average, Parabolic SAR, 0 exposed input declarations, and 0 include…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
i PSIkTD Lines
i PSIkTD Lines is a MetaTrader 4 Indicator source file. Static analysis documents Breakout, Trend, 18 exposed input declarations, and 0 include dependencies.Source-code analysis…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
MAChannel Close AD
MAChannel Close AD is a MetaTrader 4 Indicator source file. Static analysis documents Moving Average, Breakout, Trend, 9 exposed input declarations, and 0 include…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
Adxm Arrows Indicateur
Adxm Arrows Indicateur is a MetaTrader 4 Indicator source file. Static analysis documents ATR, Custom Indicator, Trend, 37 exposed input declarations, and 0 include…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
Pivots
Pivots is a MetaTrader 4 Indicator source file. Static analysis documents Breakout, 25 exposed input declarations, and 0 include dependencies.Source-code analysis only. No backtest…
MT4 / MQ4
Indicator
Missing dependencies
Indicator
Missing dependencies
Portfolio Modeller
Portfolio Modeller is a MetaTrader 4 Indicator source file. Static analysis documents Grid, Trend, File Access, 83 exposed input declarations, and 1 include dependency.Source-code…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
Camarilladt7v1
Camarilladt7v1 is a MetaTrader 4 Indicator source file. Static analysis documents Breakout, 46 exposed input declarations, and 0 include dependencies.Source-code analysis only. No backtest…
MT4 / MQ4
Indicator
Compile not run
Indicator
Compile not run
Forex Trend Scanner
Forex Trend Scanner is a MetaTrader 4 Indicator source file. Static analysis documents CCI, 1 exposed input declaration, and 0 include dependencies.Source-code analysis only….