Compiler Fixes

Fix MT5 invalid volume before changing the strategy.

Invalid volume is usually a symbol-contract problem or a sizing bug. The EA calculates a lot size the broker cannot accept, then the trade server rejects the request.

Search intent

The EA gets retcode 10014, invalid volume, or 0.00 lots when sending a trade request.

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Read the symbol volume rules

Every symbol can have different min lot, max lot, lot step, and directional volume limit. The EA should read these before sending orders.

SYMBOL_VOLUME_MIN

SYMBOL_VOLUME_MAX

SYMBOL_VOLUME_STEP

SYMBOL_VOLUME_LIMIT

Normalize then validate

Rounding is not enough. Normalize the raw lot to the step, clamp to the allowed range, then reject impossible results like 0.00 lots.

Raw calculated lot

Normalized lot

Reject if below min

Reject if risk becomes distorted

Log the sizing chain

When the trade fails, print the raw lot, normalized lot, symbol rules, margin result, and retcode so the next fix is based on evidence.

Risk money

Stop distance

Tick value

Retcode 10014 context

Use the tool

Paste the sizing block into Workfusion Debugger to add lot-step validation and invalid-volume diagnostics.

Fix the first error first

Keep full EA context attached

Recompile before changing strategy logic

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Related guides

Continue the EA build path.

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