Message “”returned value of Order Select should be checked”

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Summary

The warning message “returned value of Order Select should be checked” indicates a potential issue in the code where the return value of the OrderSelect function is not being verified. This can lead to unexpected behavior and errors in the program. Proper error handling is essential to prevent such issues.

Root Cause

The root cause of this warning is the lack of error checking after calling the OrderSelect function. The function returns a value indicating whether the operation was successful or not, but this value is not being checked in the code. Possible causes include:

  • Insufficient error handling: The code does not check the return value of the OrderSelect function.
  • Assuming success: The code assumes that the OrderSelect function will always succeed, which may not be the case.

Why This Happens in Real Systems

This issue can occur in real systems due to various reasons, including:

  • Complexity: Large and complex systems can make it difficult to ensure that all error cases are handled properly.
  • Time constraints: Developers may not have the time or resources to thoroughly test and verify all parts of the code.
  • Lack of experience: Junior developers may not be aware of the importance of proper error handling.

Real-World Impact

The impact of this issue can be significant, including:

  • System crashes: Unhandled errors can cause the system to crash or become unstable.
  • Data corruption: Errors can result in data corruption or loss, leading to incorrect results or decisions.
  • Security vulnerabilities: In some cases, unhandled errors can create security vulnerabilities that can be exploited by attackers.

Example or Code

int ticket = OrderSelect(BuyTicket, SELECT_BY_TICKET);
if (ticket  0) BuyStopLoss = AdjustBelowStopLevel(Symbol(), BuyStopLoss, 5);
    double BuyTakeProfit = CalcBuyTakeProfit(Symbol(), TakeProfit, OpenPrice);
    if (BuyTakeProfit > 0) BuyTakeProfit = AdjustAboveStopLevel(Symbol(), BuyTakeProfit, 5);
    // Add stop loss and take profit
    AddStopProfit(BuyTicket, BuyStopLoss, BuyTakeProfit);
}

How Senior Engineers Fix It

Senior engineers fix this issue by:

  • Adding error checking: Verifying the return value of the OrderSelect function to ensure that it was successful.
  • Handling errors: Implementing proper error handling to handle cases where the OrderSelect function fails.
  • Testing thoroughly: Thoroughly testing the code to ensure that all error cases are handled correctly.

Why Juniors Miss It

Junior developers may miss this issue due to:

  • Lack of experience: Limited experience with error handling and debugging.
  • Insufficient training: Inadequate training or guidance on proper error handling techniques.
  • Overlooking details: Failing to carefully review and test the code to ensure that all error cases are handled properly.

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