How to get or determine the barIndex or number by the cross point

thomas2004ch · 2026-09-08T08:23:09+00:00

Assumed 6 days ago and 12 days ago there were MACD crossover. How can I get or determine their barIndex, so I can get the value of the MACD Line?

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09/08/2026 at 10:23 AM #264992 quote

thomas2004ch
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Senior

Assumed 6 days ago and 12 days ago there were MACD crossover. How can I get or determine their barIndex, so I can get the value of the MACD Line?

cross.png

09/08/2026 at 10:59 AM #264994 quote
robertogozzi
Moderator

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Use BarsSince (https://www.prorealcode.com/documentation/barssince/):
```
CrossOver  = MACD[12,26,9](close) crosses over 0
CossingBar = BarsSince(CrossOver)
```
CossingBar contains the bar ID where the crossover occurred.

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09/08/2026 at 11:55 AM #265000 quote

thomas2004ch
Participant

Senior

robertogozzi wrote: Use BarsSince (https://www.prorealcode.com/documentation/barssince/): CrossOver = MACD[12,26,9](close) crosses over 0 CossingBar = BarsSince(CrossOver) Copy CossingBar contains the bar ID where the crossover occurred. thomas2004ch thanked this post
Many thanks!

I simply use the example code here: https://www.prorealcode.com/documentation/barssince/

But how can I understand the values? Here is a screenshot. The “previous occurrence” is 5 and the “last occurrence” is 0. By the second screenshot, the “previous occurrence” is 8 and the “last occurrence” is still 0

RSI_Crossover.png RSI_Crossover_2.png

09/08/2026 at 12:32 PM #265002 quote

robertogozzi
Moderator

Legend

I can’t figure out why your data seem to be wrong.
Mine are correct as you can see from my attached picture.
I remind you that 0 is the current bar, 1 is the first bar preceding the current bar, …. 7 is the seventh bar prior to the current one. So 0 means the crossover occurred on the CURRENT bar.

x-1.jpg

09/08/2026 at 12:49 PM #265004 quote

thomas2004ch
Participant

Senior

robertogozzi wrote: I can’t figure out why your data seem to be wrong. Mine are correct as you can see from my attached picture. I remind you that 0 is the current bar, 1 is the first bar preceding the current bar, …. 7 is the seventh bar prior to the current one. So 0 means the crossover occurred on the CURRENT bar.
Ok, now I got it. Many thanks!

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RSI_Crossover-1.png

09/08/2026 at 8:00 PM #265017 quote
thomas2004ch
Participant

Senior
Now I want print the value on the cross point. But I got error.

here is my code.
```
MyMACDLine = MACDline[12,26,9](close)
MyMACDSignal = MACDSignal[12,26,9](close)

MACDCrossOverSignal = MyMACDLine crosses over MyMACDSignal

testMACDCrossOverSignalFirst = BarsSince(MACDCrossOverSignal)

div1 = MyMACDLine[testMACDCrossOverSignalFirst]

//return testMACDCrossOverSignalFirst COLOURED(255,0,0) as "first occurrence"
return div1
```
error.png
09/09/2026 at 7:53 AM #265026 quote
Nicolas
Keymaster

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Try this version to avoid the negative integer error:
```
MyMACDLine = MACDline[12,26,9](close)
MyMACDSignal = MACDSignal[12,26,9](close)


MACDCrossOverSignal = MyMACDLine crosses over MyMACDSignal


testMACDCrossOverSignalFirst = max(0,BarsSince(MACDCrossOverSignal))


div1 = MyMACDLine[testMACDCrossOverSignalFirst]


//return testMACDCrossOverSignalFirst COLOURED(255,0,0) as "first occurrence"
return div1
```
thomas2004ch, robertogozzi and Iván González thanked this post
09/09/2026 at 9:24 AM #265027 quote

thomas2004ch
Participant

Senior

Nicolas wrote: Try this version to avoid the negative integer error: MyMACDLine = MACDline[12,26,9](close) MyMACDSignal = MACDSignal[12,26,9](close) MACDCrossOverSignal = MyMACDLine crosses over MyMACDSignal testMACDCrossOverSignalFirst = max(0,BarsSince(MACDCrossOverSignal)) div1 = MyMACDLine[testMACDCrossOverSignalFirst] //return testMACDCrossOverSignalFirst COLOURED(255,0,0) as “first occurrence” return div1 Collapse Copy thomas2004ch thanked this post
wonderful! Many thanks!

09/09/2026 at 12:05 PM #265029 quote

Nicolas
Keymaster

Legend

BarsSince: If the condition has never been true, the function returns -1.
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