Envelope Deviation… Do you mean you want an EA that Trades with bollinger bands?
Cause if you do, then you may not be just asking for an EA, you’re asking for a custom indicator inside of the EA. The reason is that the MA and Deviations of a bollinger band are external inputs. I’d have to see if the regular bollinger band will allow custom standard deviations. I actually had an idea like this before and i couldn’t make a 2.5 std.
I think I may be able to help you on this.
For the time frame, are you looking for server(broker) time, or local time?