How to return a boolean value back from a Custom block

[doeveR]

I have written some Custom code that works with parameter DayNumber that is passed in from the Custom block. I probably do this wrong but I defined a second paramter, a boolean named IsValid which in fact does NOT pass a true or false into the Custom Block but I do not know how to do this otherwise. Unfortunately, if the value is set into one of my Custom functions, I don't see this in the MT5 variable that I defined. So the question is how can I access the returned value that is set inside my Custome code block and use that value (true or false) in my MT5 EA ? Your help is much appreciated.
From the Print command within my Custom code block I can see the function does what I want but I can not access "The Result Boolean" from my EA code (so to speak).

[doeveR]

This is to show how I intended to use it but the Boolean is not changed, at least I can not "see" the change in my EA logic.

[doeveR]

I tried to fix it by removing the boolean parameter and define a global variable with the same name. This variable name I also defined in the MT5 builder but no luck. It looks like after DayOfMonth block is executed it does not continue with the condition block.

[jstap]

if you push f3 do you have a global variable containing true/false? if so return it with a standard block looking for the terminal variable with the name...

[doeveR]

In the FXDReema builder I defined a variable with the same name as the Global variable in the Studio (see screenshot above)

But it looks like the Condition block after my Custom Block DayOfMonth does not get executed. What could be the reason.

[jstap]

Tell me before you change global variables, do you have the name created from your block? Delete all relevant global variables, run the EA with your block, open global variables window and take a screenshot

[doeveR]

Working with the Studio is new for me. I created the Global variable IsValid in the builder (see the buttom pane in the builder screenshot). If I remove that, building my EA gives an error on a missing variable with this name (IsValid). in my EA I have defined the varable with the same name as well.

[jstap]

Your block has created a global variable.

[doeveR]

I have done some more reading. Should I have defined a Constant named IsValid instead of a Variable ? The main issue I have is that the boolean is set correctly in the Custom Block - I see the print output But this value is not visible/useable in the FXD builder.

[jstap]

I am trying to help, delete all current global variables, run the EA that you
created with the the studio block, and see if it has the variable. If not add code to add to it, manually to and from with fx is easy, but a created block won't chance the code to do it, you can use chat gpt to do that.

[doeveR]

Much appreaciated. I need to ask something first because I want to do it right and not waist your time. If you say delete all current global variables: do you mean from the Studio or from the builder ? I assume you mean the studio because in the builder I have one constant defined which is the parameter to the custom block.
If I delete the Global Boolean definition from the Studio I get a compile error in MT5 (builder).

So were you saying if this happens add it as constant or variable via the Fxdreema builder ?

[jstap]

I mean your platform, press f3 and you should get a window listing all global variable, stop any EA creating ones to remove, delete all necessary. don't add any constant for now, just see what the block is doing.

[doeveR]

What do you mean with "your platform". Do you mean I should start the Meta Editor and press f3 - nothing happens if I press F3 in the builder or in de Studio or the Meta editor.

[jstap]

I mean your meta trader, if I press fn F3 I get this:

[doeveR]

Ah ok, I run my EA on MT5 and see nothing

Never ever used this BTW.

[jstap]

Ok, this says no variable is being created (as long as this being after running EA), copy your code including variable name, past into chatgpt, tell it you are creating a block on FX, this is what you have and where you have it, and ask it to create code so you cand make the block work. it should give you the code to past in there

[doeveR]

I did and found the issue. I used a Custom MQL code block (instead of using the Custom Block I had created) and put in there as code: SpecialDayFlag = IsTodaySpecialDay(PlaceAtEOM); In FXDreema I created a bool variable named SpecialDayFlag that I now could access and that contains the correct value. Only a small change to the Custom function was sufficient.
Thanks for your efforts to help me !!