BTC continued the bullish trend and is now heading towards $9,000! For a bullish flag or pennant, a break above resistance signals that the previous advance has resumed.
Volume should be heavy during the advance or decline that forms the flagpole. Heavy volume provides legitimacy for the sudden and sharp move that creates the flagpole. An expansion of volume on the resistance (support) break lends credence to the validity of the formation and the likelihood of continuation.