As stated in the indicator code: "colourDeltaBar: Set this to 1 if you wish the colour change to be effective on
the actual bar where the direction change occurred.
Set this to 0 for default behaviour. "
As the indicator's author stated, "The colourDeltabar merely controls when the display colour change occurs, and thus will not cause your trades to occur earlier. The suggestion was to make sure there was no confusion with seeing the colour change on the HMA a bar before the trade was taken - thats all. "
In essence, it is a personal preference. Please closely read the following thread:
https://www.tradestation.com/Discuss...Topic_ID=40589
Hope this helps.