if any line break by chart line, you can get correct decision , if user line have a break out , you can start BUY or if lower line touched you can have sell position.
this rally of EUR/USD became to the END if it goes more down , it can be new channel for EUR/USD .
its clear USDCAD goes down more and more maybe just it came up a little and then again goes down, you can wait to when it toch up-line and start new sell.
if price bar goes in the defined directions, its can be a BUY signal
if price goes upper than selected area its can be a good buy signal