Error 4107 - Invalid Price in OrderSend Function

[Mohamadreza Mousavi]

Hi everyone,

I've encountered an "invalid price" issue with the OrderSend function in my EA during backtesting on the XAUUSD pair. The error message is "invalid price 2347.42500000 for OrderSend function." I've checked the price input, and it aligns with current market prices. I've also ensured no negative values and tried normalizing the price input. However, the error persists. Could it be related to broker-specific settings or the way prices are refreshed in my script? Any advice or insights would be greatly appreciated.

Thanks!

[Yashar Seyyedin]

Please share more details of your code including the normalizing part.

[Fabio Cavalloni]

Normalize your prices.

https://www.mql5.com/en/forum/467684#comment_53503105

[William Roeder]

1. Mohamadreza Mousavi: I've encountered an "invalid price" issue with the OrderSend function in

   Do you really expect an answer? There are no mind readers here and our crystal balls are cracked, so we can't see your machine.
        How To Ask Questions The Smart Way. (2004)
             Be precise and informative about your problem

   We can't see your broken code.

   Always post all relevant code (using Code button) or attach the source file.

2. Fabio Cavalloni #: Normalize your prices.

   You used NormalizeDouble, Its use is usually wrong, as it is in your case.

   1. Floating point has an infinite number of decimals, it's you were not understanding floating point and that some numbers can't be represented exactly. (like 1/10.)
                Double-precision floating-point format - Wikipedia, the free encyclopedia

      See also The == operand. - MQL4 programming forum (2013)

   2. Print out your values to the precision you want with DoubleToString - Conversion Functions - MQL4 Reference.

   3. SL/TP (stops) need to be normalized to tick size (not Point) — code fails on non-currencies.
                On 5Digit Broker Stops are only allowed to be placed on full pip values. How to find out in mql? - MQL4 programming forum #10 (2011)

      And abide by the limits Requirements and Limitations in Making Trades - Appendixes - MQL4 Tutorial and that requires understanding floating point equality Can price != price ? - MQL4 programming forum (2012)

   4. Open price for pending orders need to be adjusted. On Currencies, Point == TickSize, so you will get the same answer, but it won't work on non-currencies. So do it right.
                Trailing Bar Entry EA - MQL4 programming forum (2013)
                Bid/Ask: (No Need) to use NormalizeDouble in OrderSend - MQL4 programming forum (2012)

   5. Lot size must also be adjusted to a multiple of LotStep and check against min and max. If that is not a power of 1/10 then NormalizeDouble is wrong. Do it right.
                (MT4 2013)) (MT5 2022))

   6. MathRound() and NormalizeDouble() are rounding in a different way. Make it explicit.
                MT4:NormalizeDouble - MQL5 programming forum (2017)
                How to Normalize - Expert Advisors and Automated Trading - MQL5 programming forum (2017)

   7. Prices (and lots) you get from the terminal are already correct (normalized).

   8. PIP, Point, or Tick are all different in general.
                What is a TICK? - MQL4 programming forum (2014)