Price Tick Change Studies?

[TURLIES]

Hi,
It is possible to develop studies based on Price change relative to the previous price TICK, and not the previous bars CLOSE?

Eg - a simple ROC which calculates Close (present TICK) - Close (previous TICK)
: - instead of comparing present TICK to the previous bars CLOSE, which it does now if you calculate ( C() - C(-1) ).

Thanks,
Paul

[eSignal_JasonK]

Hello Paul,

You can accomplish this using the close() function and a global variable to store the previous price. Here's a code example that will display the most recent two prices in the formula output window.

function preMain() {
    setPriceStudy(true);
    setShowCursorLabel(false);
}

var vPrev = 0;

function main() {
    var vLast = close();
    
    debugPrintln("Previous: " + vPrev.toFixed(4) + "  Last: " + vLast.toFixed(4));
    
    vPrev = vLast;
    
    return;
} 

[TURLIES]

Hi Jason,
I ran the study you posted and no data was displayed - could you provide an example of a basic Price ROC for me :

Present Tick Close () - Previous Tick Close (-1)

Also, do you have any advice on the Symbol Overlay question i posted today - i think its a study you developed (EFS Database).

Many thanks,
Paul

[eSignal_JasonK]

Hello Paul,

By the way, the debugPrintln() function outputs the data to the formula output window. To open that window, go to Tools -> EFS -> Formula Output Window.

Here's the added code snippit for calculating the ROC.

function preMain() {
    setStudyTitle("ROC of Current Vs. Last");
    setCursorLabelName("ROC");
}

var vPrev = 0;

function main() {
    var vLast = close();
    
    //debugPrintln("Previous: " + vPrev.toFixed(4) + "  Last: " + vLast.toFixed(4));
    
    if (vPrev != 0) {
        var vROC = ((vLast - vPrev)/vPrev) * 100;
    }
    
    vPrev = vLast;
    
    return vROC;
} 

[TURLIES]

Hi Jason,
Do you know how i could achieve the following? :

- Can a TOTAL be STORED & UTILIZED of the vLasts for the time period of the Price Bar, so i can use this data for other calculations?

eg - the study already produces a Total of the vLasts Bull upticks and vLasts Bear downticks for a 1min or 5min period (or whatever bar period i'm using) - can these totals be stored as the last BARS data (-1) - which can be used for calculations?

At the moment, if i go to to calculate :

Bull vLast / Bear vLast = it just uses the last Bull and Bear TICK to calculate this;

= But i'd like to calculate:
Bull Total of all vLasts over 1min period / Bear Total of all vLasts over 1min period

Many thanks,
Paul

[eSignal_JasonK]

Hello Paul,

What I would do in this case is create two more global variables and call them something like, BearSum and BullSum. Then, somewhere towards the top of main() put in a little routine that looks like this:

    if (getBarState() == BARSTATE_NEWBAR) {
        BearSum = 0;
        BullSum = 0;
    } 

This will reset the variables at the beginning of each bar. Then later in main() where you set the values for Bull vLast and Bear vLast add a line after each that adds the new data to BearSum or BullSum, respectively.

    BearSum += Bear vLast;