Was gonna say too in quiet market times (asian sesh) the 15 can be flat so 5m/1m possibly becomes the best system. Often it's not clear if price is ranging or it's just very low volume trading but the ranging princilpe of watching for big moves in direction of background trend could apply. Channels probablly super importnant here as any big moves out of quiet times would likely follow channel trend. Actually it would be interesting to know how often prices breaks out of a channel in low vol times during the asian session as opposed to when ny and london are open. Is high vol a prerequisite to a break of a channel/reversal of large trend?