Public MQL5 CodeBase script

MT5 Cash Risk Probe

A read-only MetaTrader 5 script that estimates entry-to-stop cash loss in account currency, reserves explicit costs and floors volume to the broker grid without sending an order.

The engineering problem

Why this tool exists

A percentage-risk requirement is incomplete until account currency, entry, stop, cash reserve and the broker volume grid are frozen. The probe exposes that sizing boundary before execution logic is allowed to hide it.

Published capabilities

Hypothetical buy or sell loss through OrderCalcProfit()
Explicit account-currency budget and cash cost reserve
Broker minimum, maximum, step and volume-limit inspection
Offset-aware volume flooring and final-loss recalculation
Five deterministic volume-normalization self-tests
Read-only execution boundary with order_sent=false

Engineering evidence

Original MQL5 source and ZIP published in MQL5 CodeBase item #75981
MQL5 CodeBase Scripts classification, owned cover and structured limitations
Five deterministic self-tests passed in both installed MT5 terminals
Invalid connected-account state failed closed instead of inventing a volume

What this case study does not claim

A valid estimate does not guarantee fill price, commission, slippage, margin availability, trade-server acceptance or profit.
The connected-account runtime evidence proves safe failure, not a successful broker cash-risk calculation.
The script does not aggregate portfolio exposure and never sends or modifies an order.

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Review scope and boundaries

Trading risk disclosure

Futures and forex trading contains substantial risk and is not for every investor. An investor could potentially lose all or more than the initial investment. Risk capital is money that can be lost without jeopardizing one's financial security or lifestyle. Only risk capital should be used for trading, and only those with sufficient risk capital should consider trading. Past performance is not necessarily indicative of future results.

Hypothetical performance disclosure

Hypothetical performance results have many inherent limitations. No representation is being made that any account will or is likely to achieve profits or losses similar to those shown. There are frequently sharp differences between hypothetical performance results and the actual results subsequently achieved by any particular trading program. Hypothetical results are generally prepared with the benefit of hindsight, do not involve financial risk, and cannot completely account for the impact of financial risk in actual trading. Market conditions, the ability to withstand losses, and adherence to a trading program can all materially affect actual results.

NinjaTrader trademark disclosure

NinjaTrader® is a registered trademark of NinjaTrader Group, LLC. No NinjaTrader company has any affiliation with the owner, developer, or provider of the products or services described herein, or any interest, ownership or otherwise, in any such product or service, or endorses, recommends or approves any such product or service.