Does the free demo block trades in my existing EA?
No. It sends no orders and controls no other EA. It shows the state checks and persistence pattern to inspect before a source-authorized integration.
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MT5 risk-rule implementation guide
How to Stop an MT5 EA from Breaking a Prop-Firm Daily Loss Rule
Define the equity basis, reset clock, time window and restart behavior before adding a daily-loss guard to an authorized MT5 EA.
The checklist
- 1
Get the current firm rule
Keep the dated source URL and exact account type. Confirm whether the limit uses balance, equity, open P/L, commissions or a fixed starting amount. Rules differ and can change.
- 2
Freeze the reset clock
Record the firm timezone, daylight-saving handling and the exact moment a new daily basis begins. Do not substitute the computer clock for the firm rule.
- 3
Define the first baseline
A guard attached after the reset cannot reconstruct earlier floating equity from an empty state. Choose a verified source or fail closed rather than silently treating current equity as the day opening.
- 4
Persist the basis before decisions
Store the day key and equity basis in a durable state. On a same-day restart, load the saved basis before evaluating a new order.
- 5
Specify the breach comparison
Decide whether the boundary itself blocks, and whether open positions, pending orders, other EAs and manual trades are included.
- 6
Specify the time window
Use a named server or firm timezone and explicit inclusive and exclusive edges. Test just before start, at start, just before end and at end.
- 7
Own the order path
A separate dashboard cannot stop another EA from sending orders. The check must gate every relevant authorized order path in editable source.
- 8
Test restart and new day
Run one same-day terminal restart and one next-day reset. Check that the saved basis is restored once and a new basis is created only at the specified reset.
- 9
Keep the proof narrow
A Strategy Tester result can prove the configured software state transitions; it cannot prove future fills, profitability or challenge compliance.
Common questions
Why is a restart test necessary?
Resetting the daily baseline to current equity after a restart can hide losses already incurred that day. The original basis must survive the restart.
Can one setting match every prop firm?
No. The loss definition, reset clock, position treatment and breach action must come from the current rule for the specific firm and account type.
Free diagnostic resource
Inspect the open-source MT5 guard demo and real tester evidence
The non-trading HolaPrime demo includes source, a real Strategy Tester run, a same-day restart screenshot and selected log lines. Synthetic loss fixtures are labelled separately.
Open the free toolReady for a feasibility check?