Compiler Fixes

Fix MQL5 deal history without random HistoryDeals includes.

Closed trade analysis in MQL5 is deal-based. The reliable path is to select a history window, loop deal tickets, and read deal properties. Random downloaded HistoryDeals.mqh files often create conflicts instead of fixing the root issue.

Search intent

The developer is trying to read closed deals, TP hits, magic-number PnL, or trade history and gets missing include or undeclared identifier errors.

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Select the history window first

History functions need a selected date range. Without HistorySelect, the EA may see no deals or stale history.

HistorySelect(from, to)

Check false return

Log GetLastError on failure

Loop deal tickets, not guessed objects

Use HistoryDealsTotal and HistoryDealGetTicket, then read properties from each ticket.

HistoryDealGetInteger

HistoryDealGetDouble

HistoryDealGetString

Group closed PnL correctly

For reporting, group by DEAL_MAGIC and DEAL_SYMBOL, and filter entry/exit properties so entries are not double-counted.

DEAL_MAGIC

DEAL_SYMBOL

DEAL_ENTRY

DEAL_PROFIT

Use the tool

Paste your history/deal code into Workfusion Debugger to get a cleaner MQL5 deal-history workflow.

Fix the first error first

Keep full EA context attached

Recompile before changing strategy logic

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