BarIndex = 0

csntrader · 2019-11-21T08:26:54+00:00

Hi, I’m so confused over the meaning of (BarIndex = 0)? Can we rewrite the code below without having BarIndex? Thanks! IF BarIndex = 0 THEN XClose = Open XOpen = (Open + Close) / 2 ELSE XClose = Open XOpen = (Open + Close + high + low) / 4 ENDIF

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11/21/2019 at 9:26 AM #113284 quote
csntrader
Participant

Average
Hi,

I’m so confused over the meaning of (BarIndex = 0)?

Can we rewrite the code below without having BarIndex?

Thanks!
```
IF BarIndex = 0 THEN
XClose = Open
XOpen = (Open + Close) / 2

ELSE

XClose = Open
XOpen = (Open + Close + high + low) / 4

ENDIF
```
11/21/2019 at 10:25 AM #113293 quote

robertogozzi
Moderator

Legend

No, BarIndex is needed.

BarIndex is the very first bar when you load an indicator or a strategy. In your case you need it to start the HA sequence.

If you have instructions to be executed only when your code is loaded and not the next candles, well… BarIndex is what you need.

IntraDayBarIndex is another constant that returns 0 when it’s the first intraday bar of the day.

IntraDayBarIndex restarts from zero each new day, while BarIndex starts from 0 when you first execute your code and ALWAYS increases.

11/21/2019 at 4:03 PM #113326 quote

csntrader
Participant

Average

Okey, great! 🙂

Thank you!

11/21/2019 at 7:34 PM #113353 quote

GraHal
Participant

Master

robertogozzi wrote:

BarIndex starts from 0 when you first execute your code

Is above true even allowing for preload bars (default preload bars = 2000 in a strategy?) or would we need to use defparam preloadbars = 0 in a strategy?

11/21/2019 at 7:38 PM #113356 quote
robertogozzi
Moderator

Legend
Yes, it’s true no matter how many PRELOADBARS. If PreLOadBars > 0 then BARINDEX 0 will be that very first preloaded bar.

If you create a simple indicator:
```
RETURN BarIndex
```
and go back to the very first displayed bar on the chart, you’ll see what’s its BARINDEX value.

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