How to get the barSize and pair's name - DailyFX Forex Forum

cmbq · #1 (**permalink**) 04-17-2009, 11:18 AM

In my indicator, I try to get the instance's barSize i.e. H1, D1, m5 etc. I used bar_stream.barSize(). But it doesn't work, nil value.
What code should I use ? Maybe something like source.bar_stream.barSize().

How can I get pair's name, i.e. EUR/USD, GBP/USD

Thanks

Nikolay.Gekht · #2 (**permalink**) 04-17-2009, 03:25 PM

1) Bar size

Please, use instance.source:barSize() to get the size of the bar. This can be used in the Prepare and Update methods only. Pay attention, in the lua language the method name is separated from the object name with a colon. The dot is used to access the object properties.

Ensure that your indicator declares "bars" as a required source (indicator:requiredSource(core.Bar); in the Init).

2) Instrument name

There is no way to get instrument name directly. You can use the name of the stream. In Marketscope the first letters will contain the instrument name. There is not reason to provide the instrument since indicator can be applied on the results of other indicator as well as to the prices.

cmbq · #3 (**permalink**) 04-19-2009, 12:31 AM

Thanks for the answer.

My indicator bases on the MVA, so I think I can't use barSize function.

Thanks

Nikolay.Gekht · #4 (**permalink**) 04-21-2009, 10:00 AM

If you need it, you can declare you indicator as bar-based, and implement your own choice of the open, high, low or close bar as a parameter of your indicator. I can give you an example if you wish, but I will be able to do it in a few days.

yantz · #5 (**permalink**) 04-23-2009, 11:31 PM

hi Nikolay! can you give an exact example of how to extract the instrument name from the stream. i'm struggling with all these classes. thank you

yantz

yantz · #6 (**permalink**) 04-24-2009, 03:14 PM

i ended up writing my own indicators via order2go GetPriceHistory. thx all for looking!

yantz