It was USDCHF.

You may do it by yourself for EURUSD: it is not exactly as for USDCHF but similar on D1 for example (with opposite direction).

Why many people like this trading strategy?
Because it is very good trading strategy and very profitable?
No.
Because it is fully visible and understandable from the chart:
we will see our stop (it should be behind the channel but we are always taking into account the border of the channel), we can see our target (an other border of the channel). And we can answer on the "very simple" question "what?!" or "what's on here?" or "Anything?".

We can not answer on the question "why".
That is "why" many people tried to improve this system to have the answer on an other "very simple" question: why.
But it is an other story.