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.
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.
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.
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.
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.
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.
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.
Yes. A registered account is required so WooCommerce can grant a private zero-total order permission and enforce the daily quota.
No. Compilation checks code and dependencies only. It is not a backtest, live result, or profitability verification.
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.
The downloadable MQ4 and MQ5 derivatives are editable, but every modification requires independent review, compilation, and demo testing.
No. Detected runtime endpoints are preserved when replacement could break WebRequest, licensing, news, or other executable network behavior.
Free MQL Source Code Library
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.
EA Pipfinite Trend Laser is a MetaTrader 4 Expert Advisor source file. Static analysis documents Custom Indicator, Trend, Risk or Lot Sizing, 8 exposed…
Loza gdemo0 is a MetaTrader 4 Expert Advisor source file. Static analysis documents its declared MQL event and resource structure, 4 exposed input declarations,…
EMA WMA is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, 0 exposed input declarations, and 0 include dependencies.Source-code analysis…
3ma01exp Www Forex Instruments Info is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, 1 exposed input declaration, and 0…
ExpertAdvisor is a MetaTrader 4 Expert Advisor source file. Static analysis documents MACD, 3 exposed input declarations, and 0 include dependencies.Source-code analysis only. No…
a Sidus is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, RSI, 9 exposed input declarations, and 0 include dependencies.Source-code…
Stoch is a MetaTrader 4 Expert Advisor source file. Static analysis documents Trailing Stop, 8 exposed input declarations, and 0 include dependencies.Source-code analysis only….
EMA WMA RSI is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, RSI, 0 exposed input declarations, and 0 include…
Brandy v1 2 is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, 10 exposed input declarations, and 0 include dependencies.Source-code…
Hidden Sl is a MetaTrader 4 Expert Advisor source file. Static analysis documents its declared MQL event and resource structure, 2 exposed input declarations,…
FMW 1 is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, Trailing Stop, Risk or Lot Sizing, 10 exposed input…
MAMACD novlt is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, MACD, 14 exposed input declarations, and 0 include dependencies.Source-code…
exp Amstell SL is a MetaTrader 4 Expert Advisor source file. Static analysis documents its declared MQL event and resource structure, 3 exposed input…
RSI Value EA is a MetaTrader 4 Expert Advisor source file. Static analysis documents RSI, Trailing Stop, 6 exposed input declarations, and 0 include…
yug oneMA v2 is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, 16 exposed input declarations, and 0 include dependencies.Source-code…
OpenOrderMarketExecution is a MetaTrader 4 Expert Advisor source file. Static analysis documents its declared MQL event and resource structure, 4 exposed input declarations, and…
MACD EURUSD M5 is a MetaTrader 4 Expert Advisor source file. Static analysis documents MACD, 10 exposed input declarations, and 0 include dependencies.Source-code analysis…
Maus is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, Trailing Stop, 10 exposed input declarations, and 0 include dependencies.Source-code…
SAR Trading v2 is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, Parabolic SAR, Risk or Lot Sizing, 9 exposed…
Create1 is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, Custom Indicator, Trailing Stop, 6 exposed input declarations, and 0…
GreenTrade is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, RSI, 6 exposed input declarations, and 0 include dependencies.Source-code analysis…
QRSI MG is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, RSI, 0 exposed input declarations, and 0 include dependencies.Source-code…
Polish Layer Expert Advisor System Efficient is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, RSI, Stochastic, 18 exposed input…
Escape is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, 11 exposed input declarations, and 0 include dependencies.Source-code analysis only….
