DislikedSorry, but I wouldn't go that far to say what's best or not. I guess it's more like what suits an individual. Looking at past data for the London session (or part of it) there are plenty of days that would have been great on a 15min interval and even so there would have been range or fast days very rough to trade. The same is true for other timeframes as well, except that a 15min range could be (not necessarily though!) a very nice day to trade the 5mins. And yes a choppy fast day on 5min could have been much easier on 15min!
PBBIgnored
Vincit qui se vincit.