EA operations resources

Compiler Fixes

Fix unsupported filling mode without guessing FOK, IOC, or RETURN.

Unsupported filling mode means the order filling policy does not match the current symbol or broker account. Hard-coding a filling type can work on demo and fail on live.

Search intent

The EA or Python MT5 integration gets unsupported filling mode, invalid fill, or retcode 10030.

Cluster

Compiler Fixes

Tool path

mql5 compiler fixer

Reader

mq5 developer

Optional follow-up for Fix MQL5 unsupported filling mode

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Intent locked: Paste compiler errors

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Let the symbol choose when using CTrade

For CTrade workflows, SetTypeFillingBySymbol reads the symbol settings and sets a compatible filling policy.

trade.SetTypeFillingBySymbol(_Symbol)
Log false return
Avoid blind retries

Read SYMBOL_FILLING_MODE for manual requests

For MqlTradeRequest, inspect allowed filling flags and choose a supported policy before OrderSend.

SYMBOL_FILLING_MODE
ORDER_FILLING_FOK
ORDER_FILLING_IOC
ORDER_FILLING_RETURN

Compare demo and live conditions

A broker can allow different execution policies by account type or symbol suffix. Record the account, symbol, and filling flags.

Live versus demo
Symbol suffix
Execution mode
Broker comment

Use the tool

Paste the trade request into Workfusion Debugger to add filling-mode detection and a safer CTrade setup.

Fix the first error first
Keep full EA context attached
Recompile before changing strategy logic

Related guides

Continue the EA build path.