High-Water Mark
30-Second Definition
The highest peak value (balance or equity) that a trading account has ever reached. Used to calculate trailing drawdowns.
What is a High-Water Mark?
A High-Water Mark (HWM) is the highest peak in value that an investment fund or trading account has ever reached. In the context of prop firm trading, the high-water mark is the critical metric used to calculate Trailing Drawdown.
If an account starts at $100,000 and reaches $108,000, the new high-water mark is $108,000. If the account then drops to $104,000, the high-water mark remains $108,000 until the account surpasses that peak.
Depending on the prop firm’s rules, the high-water mark may be calculated based on closed balance (recorded at the end of the day) or live floating equity (the highest tick reached while trades are open).
Related Terms
Why It Matters
Understanding this concept is essential for maintaining strict risk management and surviving proprietary trading evaluations over the long term.
Visual Explanation
Real Trading Example
In a live trading environment, proper execution of this concept prevents emotional reactions. For example, if the market shifts aggressively during a New York session, relying on mechanical rules rather than intuition protects the account capital.
Common Mistakes
Common Mistake
Ignoring the rules: Many beginner traders fail because they abandon their pre-trade checklist the moment they face consecutive losses.
Professional Tips
Pro Tip
Mechanical Execution: Treat every trade as a simple execution of your mathematical edge. Over a sequence of 100 trades, individual emotional reactions are irrelevant.
FAQ
Is this allowed in prop firms? Yes, understanding and applying this concept is completely aligned with prop firm rules.
How long does it take to master? It requires consistent journaling and backtesting, typically taking several weeks of dedicated practice.
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