Use of BArindex

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05/10/2016 at 1:12 PM #6681 quote
IGOSNELL
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Hello

I have been struggling with BARINDEX and its interpretation, as far as I am aware it will tell me how many bars are loaded since the beginning of an automated strategy so the very first bar in a strategy should be 0.

I have a piece of code below where I would like to enter the position under certain circumstances and when BARINDEX = 0. But it never enters the initial position so the automated strategy wont get going.

Am I misunderstanding BARINDEX or is the code below wrong?
```
ARC = 3* averagetruerange[7](close)

IF BARINDEX = 0 THEN
inithigh = highest[7](close)
initlow = lowest[7](close)
STARB1 = inithigh - ARC[0]
STARS1 = initlow + ARC[0]
IF close[0] > STARB1 then
buy 3 contracts at market
ELSIF close[0] < STARS1  then
sellshort 3 contracts at market
ENDIF
ENDIF
```
05/10/2016 at 2:06 PM #6689 quote

Nicolas
Keymaster

Legend

The online prorealtime documentation of the site :

BARINDEX : Return the number of bars since the beginning of data loaded (in a chart in the case of a ProBuilder indicator of for a trading system in the case of ProBacktest or ProOrder)

In your code, if barindex=0, there are no way to calculate 7 previous bar of the very first one 🙂

05/10/2016 at 6:00 PM #6710 quote

IGOSNELL
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Hello Nicolas

Thanks but you have lost me.

Regards

Ian

05/10/2016 at 7:38 PM #6716 quote

Nicolas
Keymaster

Legend

In your first condition you are trying to find the highest and lowest values from the 7 previous periods, but it’s not possible since you are trying to do this at the first bar (barindex=0). So you need to wait until you are at least at the 7th bar of loaded history to find these values.

05/12/2016 at 1:12 PM #6876 quote

IGOSNELL
Participant

Average

Thanks Nicolas

Makes perfect sense, I did not see the woods for the trees.

Regards

Ian
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