shift boolean to previous bar

April 24th, 2020, 12:48 PM

Hello to the Forum,
I would like to ask for your assistance with the following question.

I want to synchronize different filters that use boolean variables.

For this I have to move a true condition to the previous bar.

Example: A condition becomes true at bar x,y,z.
How can I set the condition at the previous bar x-1,y-1,z-1 to true.

Thank you very much for your support and stay healthy!
user10

April 26th, 2020, 07:37 AM

Hey user10,

you can use

CurrentBar - BarsAgo = index of bar

In your case, this means

CurrentBar - 1 = previous bar

Best regards from near Dresden
Martin

April 27th, 2020, 09:24 AM

Hello Martin,

Thank you for the advice.
My problem is more complex.
In the history I calculate different filters which have to be synchronized.

By means of a list I get the respective beginning of a true condition.
This condition entry should now be moved one bar into the past.

All attempts to achieve this with currentbar have failed.
This makes sense, because the respective calculation only takes place at the current bar...

In my understanding I have to use a programming that calculates backwards at the last historical bar and then sets the condition to true at the previous bar.

I did not succeed with an array or a list.

Do you have an idea how I can solve the problem?

Thanks a lot
user10

PS: Gr��e nach Sachsen

April 29th, 2020, 03:21 PM

Hey User10,

do you have a concrete example for me?

We will find a solution for this!

April 29th, 2020, 05:21 PM

Hello Martin,

The goal is to move the condition one bar to the left.
I can't do this with the approach BarsAgo or with a list that displays the previous bar.

What am I doing wrong?

Regards
user10

Code

                            


protected override void OnBarUpdate()

{

    if (BarsInProgress != 0) return;

    if (CurrentBars[0] < 1) return;



    // Test BarsAgo

    myCond = CrossAbove (SMA1, SMA2,1) ? true : false;

    if (myCond) Draw.VerticalLine(this, "myCond"+ CurrentBar, 0, Brushes.Red, DashStyleHelper.Solid, 3);

    

    if (myCond) myCondPrevSeries[1] = true; // does not work ==> same result as myCond

    if (!myCond) myCondPrevSeries[1] = false; 

//    if (myCondPrevSeries[1]) Draw.VerticalLine(this, "myPrevCond"+ CurrentBar, 0, Brushes.Black, DashStyleHelper.Solid, 3);

    

    

    // Test List

    if (myCond) {myList.Add(CurrentBar);}

    for (int i=0; i < myList.Count; i++)

    {

        previousEventCounter = myList[i] - 1; // returns PreviousBar 

        if (Bars.IsLastBarOfSession) Print ("Event # "+i+ "  Occured on bar: "+myList[i] + " previousEventCounter " + previousEventCounter);

    }            



    myListCond =  (CurrentBar == previousEventCounter) ? true : false; // will never reach this value?

//    if (myListCond) Draw.VerticalLine(this, "myListCond"+ CurrentBar, 0, Brushes.Cyan, DashStyleHelper.Solid, 3);

    

    Print (Time[0]

    + " Try BarsAgo "

    + "    myCond    " + myCond

    + "    myCondPrevSeries[1]  "+ myCondPrevSeries[1] 

    

    + " Try List"

    + "    CurrentBar  "+ CurrentBar

    + "    previousEventCounter  "+ previousEventCounter);

}

May 2nd, 2020, 01:09 PM

user10

Hello to the Forum,
I would like to ask for your assistance with the following question.

I want to synchronize different filters that use boolean variables.

For this I have to move a true condition to the previous bar.

Example: A condition becomes true at bar x,y,z.
How can I set the condition at the previous bar x-1,y-1,z-1 to true.

Thank you very much for your support and stay healthy!
user10

Use a Series<bool> and set the value to the bars x-1, y-1 and z-1. This series can be handled in the same way as a Series<double>.

May 4th, 2020, 09:38 AM

Hello, Fat Tails,

thank you very much for your hint!
I have been trying to solve the problem for a few days now.

How do I assign a value to the previous bar?
Using a boolean series does not work; in my example I had formulated this.
What am I doing wrong?

According to my understanding I can't work with currentBar == previousEventCounter ==> this value will never be reached.

I am currently working on a solution with a for loop that counts backwards. I have no success with that either.

I am grateful for any support.

Thanks a lot and stay healthy!
user10

shift boolean to previous bar

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shift boolean to previous bar