Dislikedfrom my experiance, the best for eurusd and gbpusd pairs is 15 pips range bar... but if you fell succes with 3-5 , you can use this setup...
i think inside the indi you can configure how long bars you want..
Sorry for the off topic, but. Forexbird in your blog (http://forexbird.blogspot.com/) using bars of 3 range for scalping with good results in the EURUSD
Thanks and regards