Unfortunately, Drawdown Anchored Position Sizing and Adaptive Trailing Exits: Reusable Risk-Management Patterns for Expert Advisors in MQL5 is unavailable
The code has been removed. However, the huge code base still remains at your disposal allowing you to find a suitable code.
Check out other MetaTrader 5 codes:
MT5 EA Acceptance Harness
Deterministic synthetic acceptance checks for MT5 EA entry-state logic, with no market, account or order access.
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News Trading Dashboard
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Channel Breakout Dashboard
Channel Breakout Dashboard is an informational panel (not an automated trading robot) that runs on the MetaTrader 5 chart and centralizes, in one place, several market conditions that would otherwise require 4-5 separate indicators open at the same time.