
The duration of the trading range for which the breakout occurred can provide an indication of the strength of the breakout to follow. The longer the duration of the trading range, the more significant the breakout will be.
A classic breakout occurred for Gold ( GLD) in autumn 2009. After twice getting halted at about $1,000/oz ($100 for the ETF GLD), gold blasted through this resistance level as can be seen in this 3-year chart: