the channel implies timing where the price action intersects with the extension line and the upper channel line at wave (5). (if history repeats using same 423.6% extension as cycle I)
of course, it isn't necessary to know before hand what extension the market decides to use. simply watching price action approach the upper channel line is good enough indication
(as can be seen on the chart, some time around november 25 bitcoin should be at 90K is my best guess using the same cycle I extension)