Syntax Explanation Please

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04/09/2017 at 11:33 PM #31546 quote

Geester
Participant

Junior

Hello There,

In some code I have been studying, it has the following line:

body=close-open

Later in the code, it then refers to:

body[2]<0

How has the “body” variable suddenly become an array-like indexable variable? The code in question comes from the following:

Candlesticks patterns indicator

I’m new to PRT and its code so excuse the newbie questions! 🙂

Many thanks.

04/10/2017 at 12:03 AM #31547 quote
robertogozzi
Moderator

Legend
It’s not an array, PRT doesn’t have them.

It means the value of the expression identified by BIDY, 2 bars ago. It’s like writing:
```
(close[2] - open[2]) < 0
```
04/10/2017 at 4:28 PM #31638 quote

Geester
Participant

Junior

Hi Roberto,

body=close-open

PRT doesn’t just assign the result of the above to “body”, it actually “remembers” the expression for further access via the bar count indexer?

Wow. That’s neat 🙂

Cheers.

04/10/2017 at 5:38 PM #31644 quote
robertogozzi
Moderator

Legend
Yes, and you can use that feature in as many ways as you may need; if you need, for instance, to have
```
RSI[14]  > 50
```
now and the previous bar you may write:
```
RsiValue = RSI[14](close)
Condition = RsiVallue > 50
If Condition AND Condition[1] THEN
    .
    .
    .
ENDIF
```
Nicolas thanked this post
04/10/2017 at 5:44 PM #31646 quote

Geester
Participant

Junior

Thank you, Roberto! I feel a little more confident now, given your explanation! 🙂

Cheers.
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