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.
mrMartinGale Update1 is a MetaTrader 4 Expert Advisor source file. Static analysis documents RSI, Martingale or Lot Recovery, 6 exposed input declarations, and 0…
HardcoreFX is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, Custom Indicator, Trailing Stop, 3 exposed input declarations, and 0…
Profit Hunter HSI with fibonacci is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, 6 exposed input declarations, and 0…
Trade Arbitrage is a MetaTrader 4 Expert Advisor source file. Static analysis documents File Access, 9 exposed input declarations, and 1 include dependency.Source-code analysis…
Ccfp Cc Beta is a MetaTrader 4 Expert Advisor source file. Static analysis documents Custom Indicator, Risk or Lot Sizing, 12 exposed input declarations,…
Fuzzy logic is a MetaTrader 4 Expert Advisor source file. Static analysis documents RSI, Trailing Stop, 5 exposed input declarations, and 0 include dependencies.Source-code…
Limits Martin2 1 is a MetaTrader 4 Expert Advisor source file. Static analysis documents Trailing Stop, Break Even, 24 exposed input declarations, and 0…
Divergence Xpert CCItBBbFT ver1 0n is a MetaTrader 4 Expert Advisor source file. Static analysis documents Bollinger Bands, Custom Indicator, 15 exposed input declarations,…
6xIndics M is a MetaTrader 4 Expert Advisor source file. Static analysis documents Stochastic, Martingale or Lot Recovery, Trailing Stop, 22 exposed input declarations,…
RoNz Auto SL TS TP is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, Trailing Stop, 11 exposed input declarations,…
gpfTCPivotLimit is a MetaTrader 4 Expert Advisor source file. Static analysis documents Trailing Stop, Risk or Lot Sizing, 9 exposed input declarations, and 2…
MyLineOrder is a MetaTrader 4 Expert Advisor source file. Static analysis documents Risk or Lot Sizing, File Access, 14 exposed input declarations, and 2…
VR ZVERi1 is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, RSI, Stochastic, 40 exposed input declarations, and 0 include…
EMA WMA trend is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, Trailing Stop, Session or Time Filter, 4 exposed…
wajdyss MA expert v3 is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, Trailing Stop, 23 exposed input declarations, and…
RSI lvl close TR is a MetaTrader 4 Expert Advisor source file. Static analysis documents RSI, Trailing Stop, 21 exposed input declarations, and 0…
LotScalp is a MetaTrader 4 Expert Advisor source file. Static analysis documents Session or Time Filter, Risk or Lot Sizing, 5 exposed input declarations,…
Rpm5 mt4v1 geaw www forex instruments info is a MetaTrader 4 Expert Advisor source file. Static analysis documents ATR, Custom Indicator, Trailing Stop, 9…
Hedger Short v1 2 is a MetaTrader 4 Expert Advisor source file. Static analysis documents Hedging, 11 exposed input declarations, and 0 include dependencies.Source-code…
2 River v1 1 is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, 5 exposed input declarations, and 1 include…
Maximus V9 Swith Commentsx is a MetaTrader 4 Expert Advisor source file. Static analysis documents Stochastic, 7 exposed input declarations, and 0 include dependencies.Source-code…
1 2 3 forCodeBase v01 is a MetaTrader 4 Expert Advisor source file. Static analysis documents MACD, Custom Indicator, Trend, 4 exposed input declarations,…
PivotStrategy v2 4 is a MetaTrader 4 Expert Advisor source file. Static analysis documents Moving Average, MACD, 19 exposed input declarations, and 0 include…
Proffessor v5 2011 is a MetaTrader 4 Expert Advisor source file. Static analysis documents ADX, Session or Time Filter, 20 exposed input declarations, and…
