Equity Guard

A drawdown limit only means anything relative to a peak, and neither platform hands you that peak - it has to be tracked across ticks by something. Most equity-guard snippets keep that peak in a global variable, which quietly breaks the moment you want a second guard running with a different reset schedule, or you want to reset one guard without disturbing another. This header takes the peak as a reference parameter instead. The caller declares a double, passes it by reference, and owns exactly when it resets - new day, new session, new backtest run, or never. UpdatePeakEquity advances it; DrawdownFromPeak reads the gap; IsMaxDrawdownBreached does both and returns a bool for the calling EA to act on. Three checks are covered because they answer different questions. Drawdown from a tracked peak answers "how far have we fallen from our best point." An absolute equity floor answers "are we below a hard line regardless of history" - the shape a prop-firm rule or a personal stop-trading threshold usually takes. A session loss check answers "how much have we given back since a known starting balance," which is deliberately left for the caller to supply rather than guessed, because what counts as the start of a session varies by broker and timezone and a wrong guess here is worse than an explicit input. Every percentage function treats a zero or negative reference as "no drawdown" rather than dividing by it, and drawdown never reports negative when equity is above the reference. Notes and limitations - The peak is only as good as the caller's discipline in updating it every tick and resetting it at the right moments. This header provides the arithmetic, not a scheduler. - Live equity does not move during a script run, so the demo exercises every function with a spread of hand-picked reference and peak values around the real account equity rather than pretending equity itself changed. - No margin awareness. A guard that only watches equity can still let an account get margin-called between checks if positions are large relative to free margin - pair this with a margin check, not instead of one. - Nothing here closes positions or disables trading; every function returns information for the caller's own EA to act on. - No money-per-point or contract-size calculation appears anywhere in this header - it operates purely on the account's own equity/balance figures, so the tick-value/contract-size scaling this catalogue's house style calls out for money calculations does not apply here.

Script · MT5 · v1.0 · Free

Tags: MT5 Script · MQL5 Source Code

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