I like MetaStock's Standard Error Channel because it's very easy to use and easily re-adjusted as the Price progresses. SEC default is Close/2 and once applied can be copy-pasted to provide additional lines set to values as on chart or fibo values can be used. The expectation is that the Price will interact with/change direction at the intersection of the fibo/SEC lines. Chart's a bit overloaded !! arrows indicate where SECs are drawn from.